your big sister who groomed you into being her personal fleshlight has gotten a bit tired of your cunt. when she asks to try anal, you're a little nervous, but she assures you that she'll take it slow and you can stop whenever if it's too much.
you spend the night watching a movie as a way to ease up, and she lets you hit her cart while you wait. "to relax," she says as she watches you like meat. the tingly feeling in your tummy convinces you to end the movie early and head upstairs to her bedroom with her. she's back from college for summer break, and you couldn't be more excited to finally have her attention again.
when you get upstairs, she instructs you to bend over the mattress. you feel nerves bundle in your stomach as she turns the light off and locks the door, putting music on in the background. you sink a bit into the mattress as tension leaves your body. she eases behind you, kissing your shoulder before easing your underwear down and lubing up her fingers.
she stretches your asshole gently, the way you're supposed to at first. first her finger enters you while she coo's, asking permission before enterring the second. the stretch is unpleasant, a new and strange feeling, but not one you can't get used to. you'd do anything to be good for your older sister. she takes such good care of you that it's only right to return the favor.
by the time her third finger is stretching you, she's become impatient. you hear her unzip her pants and start to get nervous. she grips your hips, reminding you to relax, and that you were the one that asked her for this after all, with how big your ass has been getting. "it's your fault that i'm doing this", she explains. you nod in understanding; how is your big sister supposed to resist you? it's your fault that she has to take you like this. you feel so grateful that your older sister doesn't hate you for the disgusting temptation and obsession with her younger sister you've cursed her with.
her tip taps on your hole, and you jump. "relax," she murmurs. "i'll take care of you", she says. she enters slowly, and it doesn't feel much worse than her fingers. you slowly stretch around her, and she coos and whispers into your ear as you adjust a bit. she slides in a bit more, and you whimper at the pressure and heat that's starting to consume you. it hurts in a way you truly never expected, and it doesn't seem like she's waiting anymore.
she's halfway inside of you, but you're already tapping out and whimpering at how full you are, how much the stretch hurts. you feel her murmur an apology into your back before she thrusts the rest of her cock inside of you and starts plowing your ass. she bottoms out and you open your mouth to scream for help but she's already covering it and pinning you down.
she pushes your head down sideways into the mattress, eyes straining to see the shadow of her on top of you in your peripheral vision. you buck and squirm and try to fight her off, but she's always been so much bigger than you. there's no point: it's totally useless. and she knows it too. every time you attempt to toss her off she doesn't even budge. her moans vibrate through you while you hear the plap plap plap of her balls hitting your pussy, and feel tears gather in your eyes.
she whimpers a slew of apologies; "i'm sorry-" and "i love you so much but your ass is so tight i can't-" but your big sister has you exactly where she wants you, and you dont sense an ounce of hesitation in her thrusts. you're impaled to the hilt on her cock while she rapes and breeds your asshole. her thrusts speeds up as she gets closer, and all you can do is cling to the mattress, hoping that anything she injures will be better by the next sisterly bonding session 🩷
