My Step Sister Came to Stay
Copyright© 2026 by Highlander90
Chapter 6
Incest Sex Story: Chapter 6 - A brother's step sister surprises him and moves in with him. The two of them under the same roof creates sexual tension that eventually bursts.
Caution: This Incest Sex Story contains strong sexual content, including Ma/Fa Consensual Heterosexual Fiction Incest Brother Sister Spanking Cream Pie Masturbation Oral Sex Public Sex
“Hi Jason.” Natalie grins at me.
“Um Hi Natalie...” I smile at her but look in total confusion at Bridget.
“Bridget?” I ask.
“So funny story.” Bridget began. “I went to that diner again for lunch and bumped into Natalie on the way. I just invited her to lunch and next thing here we are.”
“Ok, so you’ve been together all afternoon?”
“Yeah we’ve been together...” Bridget says and looks at Natalie with a devilish grin. Thoughts run through my head of what that could possibly mean. I know Natalie is wild and normally up for anything.
“Yeah we’ve been getting to know each other.” Natalie adds with just as an equally devilish grin.
“I don’t even want to know” I chuckle as I head for my kitchen and fridge looking for a bottle of water. The clink of bottles sound as the fridge appears to have been filled with beers.
“Planning a party?” I joke, as I take a water.
“Just a threesome...” Bridget says in a loud whisper. I almost spit my water.
“You ok Jason?” Natalie asks.
I cough to clear my throat. “Yeah fine, just wrong hole.”
“Bring us a beer bro!” Bridget shouts.
“Please?” I retort.
“Please bring us a beer?” I grab two beers from the fridge and crack them open before passing one to each of them.
“Thanks” they both smile and giggle before cheering each other and taking a drink.
“I’m going to grab a shower and get changed.” I tell them as I go into my room. I was half expecting them to come into the room or bathroom but I’m surprised to find they don’t. I get dressed into some comfy casual clothes.
I find out why they didn’t come into the bathroom. They are both stark naked and Natalie has Bridget’s nipple in her mouth. Bridget has a fist full of Natalie’s hair in her hand and when she notices me, she beckons me over.
I don’t know why I bothered putting clothes on because I know now in a matter of seconds they will be off again.
“Natalie here has agreed to be our sex doll for tonight.” Bridget tells me very simply. “We’ve agreed we can do anything we want but her safe word is, pineapple.”
“Um ok” I nod. Not sure it was that simple but my sister clearly has a hold of things.
She grabs Natalie’s hair even tighter and pulls her away from her nipples. “Slut, you are going to suck, service and worship my brothers cock!” Wow this side of Bridget was so different, it was erotic.
“Yes Mistress!” Natalie nods as she looks over at me.
“Get on your knees bitch and suck your masters cock!” Bridget says before forceably throwing Natalie to the floor. Before I could speak, Natalie crawls over to me quickly and pulls at my pants.
“Natalie are you...”
“Her name is slut or bitch. She doesn’t answer to Natalie anymore!” Bridget says as she stands up and walks over to me. Natalie has freed my cock already and is sucking it to full mast. Bridget comes behind me and wraps her arms around me. She pulls me lower so her lips can reach my ear.
“Don’t worry bro, we’ve been talking all day. It’s very consensual and she wants this. She doesn’t have any limits but she will use the safe word when she wants to stop or we’ve gone too far. Relax bro and enjoy it, ok. For me?” She turns my head to look at her. I look into her eyes and see the trust and love there.
“For us” I say as I pull her into a passionate kiss.
Bridget and I kiss some more as Natalie takes care of my cock. Fuck she’s eager, I do remember her being a good cock sucker but she seems even more desperate now.
“She’s a good little slut isn’t she bro” Bridget grinned as she broke the kiss and admired Natalie at work.
“We are going to have a lot of fun with her!” Bridget pulled away from me and walked over to where her bag sat, she delved into it looking for something and after finding it then went for a beer from the fridge. She came back over to me and handed me the small blue pill.
“Is that what I think it is?”
“Yup, we need to keep you nice and hard to fill this little cunt right up.” She then handed me the beer, “drink up bro!”
I took the pill and popped it into my mouth before taking a drink and swallowing it down. I take a quick breath and then drank some more but this time Bridget held the bottle up and made me finish it. It was going to be that kind of night.
Bridget takes the empty bottle and quickly returns with three more, all whilst this is happening Natalie is still happily sucking my cock.
“Shall we put this whore to work?” My sister asks as she hands me another beer
“What do you have in mind?” I ask, taking a deep gulp.
“My pussy needs some attention and this slut needs to feel your cock again.” Bridget reaches down and takes hold of Natalie’s hair, pulling her away.
“You’ve missed my brothers cock haven’t you?”
“Oh god yes mistress, so badly, please fuck me master ... fuck me like the worthless whore I am.” Fuck it was so erotic to hear a woman talk like that and be completely genuine. Nothing forced od acted.
“Come here then!” Bridget basically dragged Natalie back over to the sofa where she sat down and pulled Natalie between her legs. My sister was now naked too so Natalie got straight to work eating her out. Natalie also raised her ass up to present herself to me. I downed the beer and got behind her. Her pussy was dripping, I could see it.
I didn’t bother with teasing her with any fingers, I took hold of my cock and plunged it deep inside her. Natalie moans into My sisters pussy as I start to fuck her hard.
I’ve fucked Natalie a few times before and I knew she cums easily.
Sure enough I had barely fucked had a few minutes and she was already creaming all over my cock.
“She cums so easily doesn’t she” Bridget said between moans as her pussy was being well taken cared of.
“I take it you guys fucked earlier?”
“Yeah we did! She really is an insatiable little slut!” Bridget groaned.
“Fuck that’s so hot” I groan back as I continue to slam into Natalie. I’ve got a firm grip of her hips as I pull her back into me as I thrust forward.
“Don’t you dare cum in her bro! I want your first load in me and I want her to eat it out!” Bridget demands.
“Well we better switch then, I’m not that far away.” I warn her. Bridget pushed Natalie off of her and directed me to sit down on the sofa. She was right behind me and straddled my lap but facing away from her. Moments later my cock was no inside my sister. She leant back against me as she started to bounce on my hard cock and I thrust upwards to meet her.
“Oh fuck yes that’s it!” Bridget moaned out. “You better be ready little slut, fuck ... In fact run my clit! Do it now!” It was so hot to hear Bridget being so stern.
“Yes Mistress” I hear Natalie speak as she disappears down infront of my sister. I hear the desired effects as Bridget moans became audibly a lot louder.
“Oh fuck yes, rub my clit you little fucker.”
“Fuck Bridget” I groan as I support my sister who is now frantically fucking on top of me.
“Uh uh, fuck Jason, I love your cock so much, oh fuck! Oh fuck!” Bridget cried became even louder, I could tell she was close to cumming and I was going to be right there with her
“Cum on my cock sis! Cun with me!” I tell her as I thrust harder up into her.
“HOLY SHIT! OH MY GOD! Yes yes yes yesssssssssss” Bridget pretty much howls out as one almighty orgasm rushes through her. Her pussy contracts and convulses and it sends me over the edge.
“Fucckkkkkkk” I grunt as I slam up into my sister and empty myself. I can feel Natalie’s hand still fast at work on Bridget’s clit.
After several moments of enjoying are sky high intensity, Bridget Lifts herself off of me.
“Eat my cunt whore” she demands of Natalie, I can’t see exactly what’s happening but I can imagine the sight. Bridget holding Natalie by The hair and clamping her face against my sisters pussy.
“Oh shit, yes that’s it. Eat all my brothers cum! It’s a tasty reward for being a good little slut.” I honestly couldn’t believe the words I was hearing from Bridget. I knew she a big flirty and a tease but this was just down right nasty for a lack of a better word.
“Drink it all down bitch, then thank him!” Bridget ordered.
“Yes mistress” I hear Natalie speak with a slightly muffled voice. Going by the lack of any thank you and the moaning of Bridget, I guess Natalie went back to licking out my sisters pussy.
I didn’t have to wait long when I head Natalie speak out; “thank you master for my delicious reward, may I please suck your cock?”
“You may” I hear myself saying without speaking, Bridget speaking for me. I don’t mind as I feel Natalie’s warm wet mouth engulf my cock and suck eagerly on it. At this point Bridget leans to the side slightly and twists round a little awkwardly to find my mouth. We quickly connect and make out as Natalie services my cock.
My sisters tongue swirls and clashes against mine. My cock swelling in Natalie’s mouth, the pills taking full affect as I stay as hard as ever.
“Ok time to fuck this slut!” Bridget says to me as she breaks the kiss.
“Great idea” I grin as Bridget climbs off of me. I take hold of Natalie and pull her up onto the sofa. I make her straddle me and quickly get my cock inside her. Bridget stands behind her and reaches round and forcibly grabs her breasts as I start to thrust up into Natalie.
“Oh my fucking god” Natalie cries out.
“Thank him bitch” Bridget slaps Natalie hard across the breast.
“Thank you master ... thank you daddy ... Your cock is fucking good, so fucking good.” Natalie moans as her head tilts back, her eyes closed as she endures wave after wave of pleasure.
“He has the best cock doesn’t he?”
“Yes! Yes he does! I’m not worthy of it” Natalie’s groans as her face becomes very flushed.
“Are you going to cum again you dirty slut?” Bridget asks.
“I am ... I’m so close ... I’m so ... I’m there I’m there ... aaahhhhh” Natalie’s body convulses as she cums again.
We made Natalie fuck me like this through anouther three or four orgasms. I started to loose count as Bridget keep feeding us beer, we then moved into a bottle of scotch they had bought.
“I’m gonna fuck your ass now!” I said simply to Natalie like it was a normal thing.
“Ok daddy, do whatever you want!”
“Sit at the end Bridget, I’ll make her lie down!” I tell Bridget who has been a little bit neglected. Bridget sits at the end of the couch with her back against the side. Her legs spread open and welcome Natalie as I make her lie prone on her belly. I then climb on top and spread her cheeks. Her puckered little hole ready for me.
“Fuck her ass bro, ruin her!” Bridget grins at me as she takes hold of Natalie’s hair and pulls her face to her crotch.
I take hold of my cock and bring the head to her little asshole. I apply pressure and ease in and with a pop my cock slips into her ass. Natalie groans out into Bridget’s pussy but doesn’t object. I push in further and then start to fuck her ass, hard.
I don’t play gentle or take it easy. I try to pound her as hard as I can. I want her to struggle to walk tomorrow. It doesn’t take me long to fill her ass with cum but thanks to the pill I keep going. With her muffled screams I have no idea how many times I make Natalie cum. She doesn’t make Bridget cum a couple of times.
“How does her ass feel bro?” Bridget says breathlessly to me.
“Feels so fucking tight. For a slut she has a very unused ass. Need to stretch it out more!” I say as I keep thrusting into her.
“Mmm fuck yes, keep fucking her bro, ruin her ass. Make her never forget your wonderful cock.”
I do my best to up my efforts. Forcing myself as deep into Natalie as I can. Her moans and screams muffled by Bridget’s crotch.
More drink was consumed and the events of the night began more of a blur.
The next thing I know, I’m awoken by a soft voice calling my name. It’s Bridget.
“Jason ... morning!” She smiles down at me. To my surprise she is dressed and I’m in bed apparently.
“What time is it?” I ask.
“Late” she smiles. “I’ve just let Natalie out, she wanted to thank you for an amazing night and would love to do it again sometime.
“Fuck” I groan. With all the sex and booze I’ve had a good long sleep.
“How’s your head?” She asks with concern.
“It’s fine actually but my cock has never seen so much action before. Those pills really do work.” I chuckle.
“Yeah he was a top performer last night. I can’t even imagine how raw Natalie pussy must be.” “God yeah, I lost count how many times she came.”
“Fun night though eh?” I can’t deny it was a really good night. There was something really erotic and a turn on to be able to use a girl like that. That was nothing like what I did with Natalie the first time.
“Yeah it was” I nod. “I didn’t realise you had such a dominant side to you.”
“A girl has many talents.” She smiles.
“That you do!” I say as I pull her on top of me. She squeals and giggles. I kiss her softly and tenderly and she melts into it.
“You can’t be seriously wanting another round?”
“Id always do a round with you but yeah, I need a small break at least.”
“Yeah thought so, you need your strength for tonight” she chuckles.