Sarah finishes.

Finally spent, Mandy withdraws from your mouth, a thin trail of cum briefly connecting the head of her cock to your lips. As she tries to dismount, she finds her efforts stymied by the way your body continues to shake under your sister Sarah's anal ****. "Hey, hold on, I wanna get down!" More beautiful words had never been spoken. Though it takes a moment for the request to register, Sarah nods, and her thrusting slows to a halt, her swollen shaft pressed tight against your prostate. Mandy slips off of your chest, and sits down beside you, sighing softly. Free of her weight, you enjoy the first easy breath you've had since this started, and try to think of a way to get Sarah to withdraw. The sound of Mandy shouting "Okay, you're good!" convinces you to think faster.

Sarah's withdrawal is nearly as swift as her reentry, the head of her thick member dragging almost painfully over your prostate before catching on the inside of your sphincter, only to be hammered back inside as deep as she can get it. She continues to pound you like this, back and forth, sweat beading on her forehead. It's more than a little distracting, which would explain how Meg seems to materialize on your other side, her eyes darting between your erect, dribbling member and your flushed features, watching the way you tremble with each of Sarah's thrusts.

"So, enjoying your first- I mean, second time, Dougie?" You want to come up with a clever retort, but the only thing that comes out of your mouth are grunts and whines, Sarah's fat tool driving any coherent thoughts from your head. You look down at her and see that she's completely absorbed in her thrusting, a look of intense concentration on her face. Though she's lasted far longer than either of the other two girls, she's obviously about to blow. "I bet you're gonna pop like a balloon when she cums in your ass, Dougie. Or maybe you'll just swell up like a condom, hahah!"

A scathing rebuttal finally springs to mind, only to be interrupted by your little sister slamming her hips against your ass with enough **** to lift your lower body off the bed, squeaking out "C-cumming!" as she proceeds to flood your ass, her thick cock jumping inside you. You can feel the fluid being pumped into you, a swelling sensation filling your abdomen even as her member still shudders against your abused prostate. You can't take it any more, and finally start to cum, your head rolling back only to feel a pair of lips wrap around the head of your member. As your overdue orgasm peters out, you look down to see Meg pull away from your crotch, her cheeks slightly bulging, a mischievous slim playing at the edges of her mouth. She grabs the sides of your head and locks lips with you, thrusting her tongue passed your teeth and forcing your own semen into your mouth. Exhausted and worn, you simply accept the salty gift, swallowing when she withdraws. You're really too tired to care at this point.

The last thing you feel before passing out is Sarah tugging her fat glans out of your hole, the cum lodged inside of you beginning to gently ooze out.