Hi,Stan again.It's been about a month since my sister's boyfriend Frank joined in on my escapades with my girlfriend Susan & my sister Karen.Frank had told me that the sight of seeing me fuck my sister Karen had turned him on like never before.He had talked about letting his little sister Sonia join in on our fun.I had thought about it,but, she was so young at 15 that I thought we might get in trouble if anyone found out.We had to come up with a plan.

It started with Frank telling Sonia that he wanted to throw a party for Karen & wanted her to help."What do you need me to do?",she asked."Well,you know those costumes that her brother Stan & his girlfriend wore at the amusement park?" Sonia nodded "Yes"."Well,since it's near Halloween,we all want to wear different costumes for the party,so if you want to go,we have to make one for you." Sonia's eyes opened wide."Really?",she said"I always wanted to wear a real costume! What about you,you gonna wear one?" "Yeah,I already have it made."Frank said,"I'm gonna be a lion,Stan's gonna be a devil,Susan's gonna be a dragon,& we're gonna make a cat costume for Karen." "A cat eh?",Sonia said."Then I'm gonna be a mouse."It was all set.

They brought Sonia over to my apartment & we started to make her costume.We made it very special just for her introduction into fursuits. First the body was, of course, made of spandex.It was brown with a light brown running down her front.A long light brown tail out the back above her rear-end.She asked why we put a zipper on it & we told her it was in case she had to use the bathroom.Little did she realise the real reason.The top of the head was a spandex hood leaving her face exposed.We then made a furry hood to go over that.It had a short snout,painted on spandex eyes so she could see through it & we left the mouth opened.It has small ears on top & whiskers on the sides of the snout.She was just about the cutest thing I've ever seen.It was all set.

Frank brought her over on the big day.They walked in & me and Susan were already in our suits.Sue decided she wanted to be the new dragon costume we made.It was a full spandex suit.Pink with fur on the shoulders & small cute wings on the back with a long tail that dragged on the ground.I was in my demon suit.I usually wore this suit when I was in a real dirty mood & today,I felt rel dirty.

"Wow!You guys look great!"she said.We shook our heads in acceptance."Let's go get our suits on."Frank said."Okay."Sonia responded.As they were walking towards the bedroom,I swear I saw Sonia give a glance at my crotch.My cock started to thump,just at the thought of this.Sonia,is really cute for a 15 year old.She has long dark hair & big beautiful brown eyes.And for a girl that young,she had nice breasts.They're B-Cups but she is small & thin & they look bigger than a B.And don't let Karen or Sue know,but her ass is fantastic,even better than theirs.She wiggled it when she walked & I think she gave a little extra swish as she walked away from me."You like that don't you?",Susan asked,my head snapping back in her direction.I shook my head up & down."Well,don't give your hopes up yet.She just thinks we're here to celebrate Karen's birthday.I saw Frank step out of the bedroom & into the bathroom with his costume in his hand to change in there.

Sonia stepped out into the living room now in her suit."Oh Man",I thought to myself,"I gotta have that,I don't care how old she is."I sat down on my chair & continued to stare at Sonia.She walked over & said,"Can I sit on your leg? This tail will get in the way if I sit on the couch." "Sure.",I said,pointing to my leg.She sat down on my leg."This is great,how did you learn to make these costumes?" ,the young girl asked."Well,",Sue answered,"When we worked at the park,we saw how they were made there.We just took some suggestions & altered them for us.As she was talking to Susan,I noticed she put her hand on my inner thigh.I couldn't help myself.My cock started to swell.Slowly she was rubbing back & forth up & down my inner thigh.Sue told me later that she'd noticed this but,didn't want to say anything.After all, this is what we wanted to happen.The sensation of Sonia's little lycra clad fingertips lightly rubbing my thigh was too much to stop me.My cock started to swell & get hard.Like a snake,my prick slowly slid down my costume's leg,gently runnimg down the length of my spandex suit.It was getting closer to her hand,but there was nothing I could do or say about it.Suddenly,Sonia's hand brushed the head of my cock.She slowed her hand's movements down,each time stopping on my dick for a few seconds until she just left it there. She was still talking to Susan all the while, while her hand was cupped over my shaft. I began to wonder if she even knew where her hand was. My cock was throbbing under her palm, & a sticky pre-jism trickled through my spandex rubbing off on her thumb.

Frank now walked into the room,his lion suit in all it's glory.This was one of the best we made.It was a full golden-brown spandex suit with a long tail in back.Clawed big feet & little claws on his fingertips.The head was like the mouse head we made for Sonia.It was a hood with a hood over it with a big mane of fur around the head.His mouth was the only thing open on the suit.

He sat on the couch next to Susan & Sue leaned back onto his arm & shoulder.Frank put his arm over her shoulder."So Sonia?",Frank asked,"Do you like these costumes?" Sonia said,"Oh yeah,they're awesome.Do you guys hang out here in them all the time?" we all looked at each other not expecting her to think we had the suits for a long time already."What makes you ask that?",Susan said."Well,it took a while to make just my suit & you guys worked on it together,so,you had to have made yours a while ago.",She made her point."Well,yeah",Sue answered."once in a while we do. It's like having a party every time." Sonia looked around & then asked,"How come they're made of spandex?" "Well,",Frank said to her"Spandex is so much cooler than let's say cotton or furry materials so we can hang out in them all day.Don't you like the way they feel?" Frank was making subtile questions to move things along."Oh they feel great!",Sonia said & with this,she rubbed down my still hard cock.Now I knew she knew what she had in her hand."Plus, it shows off your bodies." I slowly placed my left hand on her back & slid down the slippery material until my fingertips slid under her tail & into her ass-crack."And yours too",I exclaimed."Oh,do you like it Stan?" I nodded in response to her question."C'mon,let's dance!",she said & stood up & walked to the radio.She put on some music & turned towards me.She moved her hips side to side gyrating with the music.Then she looked at the bulge in my suit,staring right at her."Whoah!",she jumped back."What's the matter?"Susan asked.Sonia waved her hand to Sue to call her over,all the time eyes gazed on my cockmeat straining under the elastic.Susan got up & walked to her.Sonia grabbed her hand & pulled her into the kitchen.

Frank looked over at me & noticed my excitement."Dude.",he said.I shrugged my shoulders at him."I couldn't help it,your sister's so fuckin hot.",I said,"And what a fuckin' body."I know",Frank said,"I never noticed how tight her bod is.Her ass is killer." "So,it's a go then?",I asked" I can do it." Frank said,"Fuck yeah,it was never a question.But, I get her second." I gave him a thumbs up."

Meanwhile,in the kitchen Sonia was going crazy."Oh my God!",she exclaimed "Stan's thing is showing right through his costume & it's hard.Sue would you be mad if I told you I wanted to touch it?" Sue paused a moment pretending surprise at such a question."Have you ever touched one before?",Sue asked."No,but I saw Frank's when he was changing his clothes once." Sue giggled,"Oh yeah is he big?".Sonia nodded & then laughed at herself."But,Stan's is bigger.So can I?" "You want me to show you what to do with it?" If Sue could've seen Sonia's face,she would have seen her blush.Sonia nodded slowly."Let's go ask them.",Sue said & then walked her by her hand back into the living room.

"Stan,Sonia has a question for you.", Sue said & then turned & pointed at Sonia."You ask him."She said shyly. Sue shook her head,"Oh no.You gotta ask him. Sonia looked at me & said shakingly"Um Stan,can I...touch...your thing?" I looked at Frank & he looked back.We both blurted out with laughter. Sonia turned as if to run."NO,NO,NO!",I exclaimed,"we're not laughing at you.We're just surprised that you would say that.Sure,you can touch it." Sue took her by the hand & lead her in front of me."I promised I'd show her what to do.",Sue said."First, touch it through the costume.See how smooth it feels." Sonia slowly placed her palm on my shaft & started to gently rub it."It's so warm.",she said"It feels nice."She stroked me a few times.My cock throbbed under her touch."Now, reach over & unzip his costume.Go on." Sonia reached with her other hand & slowly unzipp my zipper,still stroking my dick,another spot of jism appearing."Now, reach in & take it out." She reached in starting at the hilt,she moved her hand down my whole shaft,down the leg with her lycra covered hand.Then pulling it around,she slipped it out into the air."Oh WOW.",she said softly." Look how big it is!" Sonia rubbed her little hand around the whole thing.Up & down with little half twists.I couldn't believe the sight of this.This petite little beautiful spandex-clad 15 year old mouse-girl was pumping away at my cock."Oh!,"I started to moan."Not yet Honey.",Sue exclaimed "I want to teach her more.I had to grab my cock in my own hand so I wouldn't come."Like what?",Sonia asked her tudor."Well, do you want to taste it?" Sonia stared at my rod & asked,"Taste it? You mean put it in my mouth?" "Sure",Sue answered "we girls do it all the time.It's called oral sex.Want me to show you first." She nodded & then focused on my dick again.Sue took my prick with her hand & started to lick the tip."You start by licking it like this.",Sue said to her student.Sonia leaned over sticking her tongue out towards my cockmeat until she lightly touched it with the tip.She continued to lick it while Sue then ran her tongue down my shaft coming to the hilt.Without saying a thing,Sonia did the same on the other side & then ran it back up,licking my head again.Sue pulled my cock back & said "Now, take it in your mouth like this." Sue sucked my head into her mouth.Waiting there,she looked at Sonia & mumbled with my head in her mouth"Life Dif Otay? "Okay let me try.",Sue took me out of her mouth & pointed me at Sonia's waiting lips.She slowly licked her lips in anticipation.Opening her mouth a little,she pushed onto me.Her lips being parted by my widening cock.She slowly started to suck on the head."That's a good girl.Now,go down a little more.",Sue coached.Sonia pushed a little more,taking as much as she could."MMMMMMMMMM",she moaned as she sucked up & down my cock.I twinged at the vibration caused by her moaning.She pulled up,grabbing my slick dick with her hand."Does that feel good?",she asked me."Oh,you feel so good." She looked at me & shyly asked,"Does it matter if I can't take it all the way in?" I shook my head."No, most women can't,but it doesn't mean anything. A guy loves this no matter how much a girl can take.Do you like it?".She shook her head violently & laughed."Yeah,I love it" and she shoved her mouth down around my cock once more."Oh !",I moaned softly.

Suddenly, Frank stood up."She's here !Karen's home !Everybody hide in the kitchen !" Sonia stood up & wiped her mouth with her arm.I stood up & ran towards the kitchen right behind her,my hard dick flopping up & down,hitting my stomach & legs.All 4 of us got into the kitchen.I struggled to put my dick back in my suit. I got it in & zipped myself up just as we heard Karen at the door.She already knew about the "party" ,but,we had to pretend to Sonia.As we stood there lined up one behind each other,Sonia reached back & continued to stroke me through the suit.I tried to pull back,acting like I had to lose the erection before popping out in front of Karen. She stepped intp the apartment. "Frank,Stan,Sue,where are you? I know they said they were gonna be here.",Karen asked to a supposively empty room."Where could they be ?"This was the code to jump out.

"SURPRISE !" We all jumped out.Karen jumped back feining shock."Oh my God !What the...",then she looked at all of us."What nice costumes." Sue spoke up,"Sonia is here,she knows about our suits.But,look at hers." Sonia walked out from behind Frank,a little embarrassed by her suit to someone not wearing one."Wow, Sonia",Karen said."You look fantastic.So sexy."Then Karen looked at me.My dick half soft & the few stains of jism on my suit could not hide anything."So, you guys havin fun already?",she asked."Well,hold on,I'll go get a suit for myself." Karen walked into the bedroom. I sat back down on the chair & Sonia knelt down in front of me."Go on,",I said "Take it out." A smile grew on her face as she eagerly unzipped my suit,grabbed my cock out & popped it into her mouth."Well,",Sue said,patting Sonia softly on the back of her head."Since you're having fun with my boyfriend,I'll just have some fun with your brother."She walked over to Frank & knelt down next to him. Frank unzipped his fly & his dick sprang out on it's own accord.Apparently, seeing Sonia sucking my dick had hit a hard spot,so to speak.From my point of view,I could see the back of Sue's head bobbing up & down on Frank's cock.

Karen now came out, wearing her black cat suit.She had the new head on it,which is made like all our new suits.With the hood & the open mouth."So!",she exclaimed loudly,"I see that you like Frank eh Sue? Well, I guess I'll join Sonia.She knelt down next to Sonia & placed her hand on Sonia's back."MMM,that looks good.Does it taste good Sonia?" "MMM-HMMM",Sonia said with a mouth full of my cockmeat."Can I eat your pussy Sonia?",Karen asked.Sonia pulled my dick out,looked at karen & said,"What do you want to do?",she asked."I want to suck & lick your pussy down here.",Karen reached down & rubbed Sonia's young twat."OOH",Sonia exclaimed "That sounds nice."Karen got down on the floor & placed her head between Sonia's young spandex clad thighs.She reached up & unzipped her crotch,exposing her young almost hairless pussy."Did you ever have anyone do this to you before Sonia",Karen asked.Sonia pulled off me just long enough to say no."Oh,",Karen said,"I'm gonna be the first to taste your young pussy.It's so sweet!"Karen licked up & down her slit.Reaching in she spread Sonia's lips wide to get her tounge in."MMM-MMM-MMM-MMM! ",Sonia moaned continuously as she continued to suck me.She was speeding up her rhythm.I couldn't hold out any longer."Sonia,I'm gonna come!""MMM-MMM-MMM-MMM!""OOOOOHHHH! FUCK !",She was still sucking when I started to come.She sucked faster,my come dribbling out of her mouth onto the floor."MMM-MMM-MMM-OH!" she pulled me out of her lips & dribbled more come onto the floor.After I was done,she placed me back in her mouth.Karen stopped sucking her pussy & sat up behind her."Oh,my God!",I said."I'm sorry I didn't tell you about that." She took me out once again."Oh that's all right,"she said & with a quick flip of her tongue,licked the tip of my prick."It was great.I love it.I want more." Sue turned around"Well, how about sucking your brother's dick? It's so yummy." Sonia acted surprised. she wiped her mouth with a towel I handed her."But,Frank's my brother.I can't do that.",she said.Frank grabbed his dick & said."C'mon sis. Come suck on your big brother's dick." Karen whispered,"Go on.It's nice.I don't mind."Sonia playfully placed her finger on her lips."Okay, but you can't tell anyone." "What we do here never leaves this apartment no matter what we do. If they knew what we do, we'd be in big trouble." Now Sonia's curiosity was aroused,"What do you do here?", she asked.We looked at each other."Well, I'll tell her since she's my sister.",Frank said."We've been having sex with each other,swapping each other's partners."Sonia looked around at everyone."What about you two?",she asked,pointing at me & Frank."Do you have sex too?" I sat there stroking my dick trying to get hard again."Yes,",I said "Sometimes we give each other oral sex on special occasions.""Really,"Sonia said "Is this a special occasion?"I looked at Frank & he nodded his head."I wanna see Stan suck your dick Frank."Well, how could I turn this girl down.She gave me her first blow job ever & I came in her mouth.God she's so hot,I thought to myself."If you want to see it Sonia,"I said "I'll do it just for you."I stood up & walked over to Frank.Getting on my knees,I knelt next to Sue who was keeping him hard with slow strokes."Hold on,I wanna see.",Sonia said,running over to the couch.She sat down on the arm & stared intensely at her brother's cock & my ever closening mouth.

I stuck out my tongue & started at the bottom of his thick prick.Licking all the way up the shaft,along the bottom "vein"."Ohh.",Frank gave a sigh of pleasure.Susan unzipped her crotch & climbed up on Frank's face,laying her moist snatch onto his waiting lips.I sucked slow but hard on his cock.I looked up at Sonia.Her lips had a slight part,showing just a hint of her upper teeth.Her tongue licking her bottom lip.She ran her hand down her front.Over her tits,stopping for a moment to rub her hard nipples.Then she continued down,past her belly until finally slipping her fingers into her pussy."Oh God.",she slighty moaned."You guys are making me tingle all over." I released Frank & asked,"Do you want to taste your brother?" Frank tilted his head back off of Susan & stared at his sister.She stared back at him."Can I?",she asked.Frank just nodded.Sonia got off the arm of the couch & got on the floor next to me.Frank moved Susan aside."I want to see this.".he said to Sue so's not to upset her.I sat there,wanting to get a close veiw of what was going to happen.She nervously took her brother's huge manmeat into her quivering little hands.She stroked up & down using both hands to surround his monster.She stuck out her cute pink tongue & waved it at his dick.Slowly she lowered her head onto him.Touching with her tongue first & then sucking it in."OHHHH!",Frank let out a giant groan.Sonia sucked hard,almost wanting him to come fast.I got down on the floor & dove my face hard into her snatch.I sucked her pussy lips into my mouth,playing with them with my tongue."MM-MMMM",Sonia let out a moan.As I lay there licking & sucking her sweet little snatch,Karen layed between my legs & stuck my dick in her mouth.Double incest in a room full of animals.My cock grew with every motion.Susan regained her position on Frank's face.Slurping sounds & moaning echoed throughout the room.Sonia's pussy was the best I ever tasted.Frank started to groan louder & louder.We knew he was going to come.Sonia knew this as well.She moaned almost whimpering waiting for his hot liquid."OH SHIT!",Frank screamed.Sonia sucked hard & long taking it all into her mouth.Frank grunted."OH,OH,OH",over & over as his come shot deep into her throat.She swallowed as hard as she could,taking all of his love juice."Holy shit that was the best.",Frank said.Sonia giggled as she continued to suck on Franks now softening cock."Hey Stan",Frank said "Do you want to fuck my little sister?" I looked up from between Sonia's legs & said"Are you sure it alright?" "I wouldn't have asked if I didn't mean it." I sat up into my chair again."Of course,",I said "I've been waiting all day."Sonia looked at me & asked,"What does fuck mean?" Karen kneeled next to me & stroking my cock she said,"That's were you sit on Stan's lap & you put his thing inside your pussy." I realised,we haven't fucked today yet." Okay,but will it hurt,I mean he's so big?",Sonia asked."Have you ever put anything into yourself before?",Susan asked her."Sure,but nothing that size.",Sonia answered "And it hurt a little the first few times." I answered her,"I'll take it slow.Please,I want to be your first." Karen was still stroking me,my sister keeping me hard for this young pussy I so dearly wanted to feel myself in.

She walked over towards me."How do I sit?",she asked."Well,just turn around & slowly sit down on me.",I said.She turned around facing away from me & started to lower herself onto my cock.I quickly licked my hand & rubbed her pussy but,she didn't need lubrication.She was already moist & ready. Very slowly,she stuck the head of my prick into her wet hole."Ohh,it's so warm.",she said."Now take it easy",I said" a little at a time.I looked at everyone staring at us.They were smiling at us,enjoying the sight of us.Sonia lowered herself a little more.She was about halfway down."How does she feel Stan?",Frank asked me."Oh my God,she so fucking tight.Your sister's the best!",I exclaimed."OOOH",Sonia moaned as she lowered herself down my rock hard 9 1/2 inch dick,her pussy juice dripping down around it."I think she likes it!", Frank said,playing with his hardening cock in his hand."Oh yeah.",Sonia yelped,"It feels so good!".She shoved herself the rest of the way down my shaft."OH,OHHHHHH!",she let out a scream of delight.Instinctively,she moved her ass up & down on my cockmeat,slick with her own juices.She kept up the rhythm for what seemed like an eternity.I didn't want it to end.She was so tight.I held my hands on her spandex covered hips & helped her."Oh shit!",I pulled my cock out of her,grabbing the hilt so's not to come."Get down on the floor on your hands & knees now.", I ordered her.She leaned over onto the floor,her ass held high & her pussy inviting me.I knelt behind her & slowly stuck my dick into her,pulling it out & re-inserting it a few times before comencing with my fucking.I grabbed her hips towards me.Pulling her closer with each thrust.It was the first time I wished my cock was longer so I could feel me deeper inside her.Susan got under her,putting her head by her pussy in a 69 position.She leaned up & licked on the young girls pink lips,lightly licking my cock too.Frank got down on his knees in front of Sonia & waved his dick at her mouth."Gimmie it Frank,",Sonia said seductively."I want it."Almost surprised at her order & this sexy voice coming from his 15 year old sister,Frank pulled his cock away from her for a second.Then, he lowered it onto her waiting tongue."MMMM", Sonia groaned,taking his cock into her petite mouth.Karen got on the floor,belly down,between Frank legs facing Susan & unzipped Karen's crotch.Karen's crotch was soaking wet.Sue then parted Karen's pussy lips & shoved her tongue deep into her twat.We were all moaning in unison with each thrust of our appendeges.Sonia let out a scream,knocking her brother's dick out of her mouth."Something's happening.",she said,"Oh,Oh,Oh,OHHHHH!!!"I felt my cock being covered with her warm juice.I had made her come.It was the first time she had come & I made it happen! I wanted to come,but I didn't want her pleasure to stop so soon.I continued to fuck her until she asked me to stop."My God,",she said,"What the hell happened.That felt so good." "You came,",I said with my cock still in her,but not moving."Wanna come again?"She shook her head yes.I sat back up on the chair.Come sit on my lap again,but this time face me.She got on top of me,kneeling on the sides of me on the chair.I lifted her up a little & placed my cock inside her.She started to buck like I was a mechanical bull.Frank grabbed Susan's ass up from the floor where he was & started to fuck her "doggie style",all the while watching me & his sister.I reached up & played with Sonia's perky breasts,rubbing her nipples lightly.Karen kneeled next to us.With one hand she rubbed Sonia's lycra-clad ass & with the other,she lightly stroked my balls with the back of her hand."C'mon Sonia!", I ordered."Come for me again." She moaned,"Oh yeah! Fuck me Stan,fuck me !Uh-huh fuck me." I was almost driven mad when she screamed again,"OH GOD I'M COMING,I'M COMING AGAIN !" I felt her juices flowing,dripping down my cock & covering my spandex covered balls & Karen's hand."Oh shit! I'm gonna come!",I exclaimed,"I'm gonna come!OH!" Karen grabbed my cock out of Sonia's pussy & barely got it into her mouth before my hot come shot into her throat."mmm-MMM",Karen moaned,muffled by my cockmeat.I heard Frank moaning & looked over to see him coming all over Sue's spandex covered dragon back.It almost felt painfull the way my cock felt.Karen sucked so hard loving the taste of Sonia's young pussy juice on her brother's cock.I shot for what seemed like hours down her throat.Sonia collapsed on my chest."Oh Stan,",she said "That was great.I wish we could have a party like this everyday." I placed my hand ontop of her fuzzy like mouse head & rubbing it gently I said,"We can Sonia.And you're invited to every one of them."