sinsofthesister

[sinsofthesister]

They don't want you to know this but your little sister is actually a fleshlight designed specifically for your cock. Like, molded uniquely for no other purpose than to be used by her big sister. This is why you should fuck her, if you don't, you're not giving her the chance to fullfill her one purpose in life.

[sinsofthesister]

[sinsofthesister]

thinking about big sis and little sis dry humping before anything serious starts happening ,, like noooooo little sis we can’t do naughty stuff like this but i’m still grinding my bulge that’s about to burst through my tight jeans against you anyway because i can’t help myself regardless ,,

[sinsofthesister]

if they didn't want you to fuck your sister, then why did they make her so breedable??

[sinsofthesister]

I need a jealous old sis who fucks me infront of all her friends cause one of them hit on me

[sinsofthesister]

Big sister that rams her fat knotted cock so hard up my ass that I permanently become an incoherent bumbling puppyfag <333

[sinsofthesister]

I go downstairs, knocking on my big sister’s door. She yells through, “Open!” so I step inside. I come in to a familiar sight, her leaning forward on her bed as she focuses on a game. “Hey, what’s up?”

“I’m lonely,” I squeak out. She just pats the bed next to her, so I sit down and lean on her shoulder.

A few seconds later I hear her whisper, “Fuck,” and she puts the controller down. She turns to me and wraps her arm around me, rubbing my shoulder. “What’s up, sis?” I just lean into her harder and curl into a ball. “Oh honey.. Comere,” she says as she scoops me into her lap.

“I’m sorry I always have to come to you. I know I’m probably annoying you.”

“No, no you aren’t. Not at all.” She holds me tight, leaning her head on me.

“Sis.. why didn’t they want me?” I ask, my voice breaking as I start to cry.

She just sighs. “Mom and Dad suck. They didn’t like it any better when I came out, but I was moving out, so it didn’t really matter. I’m really sorry they kicked you out.”

“No. Please don’t be sorry. I’m sorry you’re stuck with me.” She sits back and pulls me up to look at her face.

“Hey, I am not stuck with you. You had friends to stay with, and I insisted you come here. I love you.” She brushes the hair out of my face, wiping some of my tears away.

“But.. you don’t love me the same.”

“I… I know. It’s just, you’re my little sister. It’s not supposed to be that way.” She can’t look me in the eyes.

“But.. if it was normal.. would you?”

She pulls her hands away from me. “I- I don’t know. Can we not talk about this please? I already feel weird enough about the things we’ve done before.”

“I’m sorry…”

“It’s okay, seriously. I get it. It’s not like I’ve never though about it, even before you admitted it to me. It’s just… we aren’t supposed to.”

I sit up, trying to read her face as much as I can. “…We aren’t supposed to be trans either. Not supposed to be gay. Doing what you’re supposed to is boring.”

She perks up a little, contemplating. “That’s… a fair point, but one that I’m not sober enough to think about.”

“Can I sleep with you tonight?” I stick out my lip and give her puppy eyes.

She pretends to be annoyed with me. “Ugh, fine I guess,” she says as she cracks a smile. “Shirts stay on though!”

“But it gets hot under your thick blankets!!”

“Just… ughhh. You’re gonna get me in trouble, you know that?”

I smile at her and stick my tongue out playfully. “Yeahhh…” Then I take my shirt off and climb under her covers, noticing her eyes lingering on my chest longer than they’re ‘supposed to’ before I turn the light off. “Goodnight big sis!” I say as I feel her arms wrap around me. I’m safe.

[sinsofthesister]

Big sis who is exhausted after a long day at work. She gets home and plops down on the couch, not wanting to move a muscle.

Little sis who wants to play with her big sis, but can't convince her to get up and do anything. She knows work has been hard on her big sis lately and she misses getting to spend time with her. It makes her sad to see the toll that it's taken on her sister and she wants to do anything she can to cheer her up.

Little sis gets an idea. She gently unzips her sister's pants and pulls out big sis's girlcock. She starts gently licking it, eliciting soft, involuntary moans from her half-asleep sister. As she gets a bit more confident, she takes the tip in her mouth, causing it to twitch as she swirls her tongue around it.

Big sis's eye's flutter open. Her face flushes and her cock fully hardens as she realizes what her little sister is doing. She briefly thinks that maybe she should put a stop to it, but fuuuuck, it just feels soooo good... Besides, she doesn't have the energy to put up a fight even if she wanted to. She's entirely at the mercy of her little sister. "Mmmmhh... sis..." she moans louder, accepting her situation.

Little sis takes this as the green light, and starts to take more of her big sister into her mouth, bobbing her head up and down more vigorously on her shaft. This has the effect of producing increasingly feral noises from her big sister, who has completely lost all ability to hold back.

Big sis who is rapidly approaching the edge. She can barely eek out the word "C- CUMMING!!!" before her throbbing cock begins to pulsate as she explodes into her little sister's mouth.

Little sis who desperately drinks up all of her big sister's sweet cum, sucking out the last of it as her sister rides the aftershocks.

Once she starts to regain her senses, big sis gently pulls her little sis into an embrace. She smiles and plants a kiss on her little sister's forehead, then whispers in her ear, "I love you, sis."

[sinsofthesister]

Little sister who wears small loose clothing when her big sis is around

Little sister who likes to get high or drunk when hanging out with her big sis

Little sister who ��accidentally” falls asleep in her big sis’s bed all the time

Little sister who always asks her big sis inappropriate and sexual questions

Little sister who insists on cuddling with her big sis and watching shows with lots of sex

Little sister who feels her big sis’s bulge but keeps her head in her lap anyways

Little sister who is finally getting shown the consequences cause her big sis got tired of the games

Little sister who slowly stumbles out of her big sis’s room, half naked with her shirt torn and cum dripping out of her

[sinsofthesister]

older sister who pimps out her ridiculously hung young sis to ruin all her friends' wombs (she gets to watch, of course)

[sinsofthesister]

little sister who keeps sleepwalking into her big sis's bedroom and savagely fucking her unconscious sister until the sun rises, before then stumbling back to her own bed. both sisters are entirely unaware that this happens every night

[sinsofthesister]

sisters who, once they start kissing, can't stop until at least one of them is fucked unconsious in a pile of jizz

[sinsofthesister]

two girls

one who took her mother to prom

another who took her sister to prom

both are scoring tonight 🤍

[sinsofthesister]

featuring big sister's insatiable appetite for little sis' cock

[sinsofthesister]

your determined little sister is trying to get you pregnant! share this post to say 'swing those hips little sis!'

[sinsofthesister]

crying into my cereal cus im not cumming unprotected inside a fat hairy big sister