"Mmh Mfh" ("No thanks, I'm good")

"No? That's ok, I'm getting plenty of boymouth lately", your little sister absolutely shines. Before you have a chance to ask her to elaborate, she continues:

"I decided on one of my classmates and brought him home," she sits down next to you on the sofa and pats your head, "he's tied up in my room, gagged with a pacifier just like you..."

Seems your little sister has grown up a lot since she and Crystal took both your virginities only a couple days ago... you're not sure how you feel about that. Crystal's talk about how a boy's natural place is as a cumdump for girls has clearly left an impression on Sarah, and you suspect this is only the beginning of her change in attitude.

"I gotta say, the sight of a boy with his butt in the air, suckling on a plastic dick on one end and taking a real girldick in the other is something I'll never tire of", Sarah sighs contentedly, as if confirming your suspicions.

She leans back and relaxes just as someone enters from the door behind you. Following the sound of footsteps coming closer, there's a familiar pressure in the still gaping entrance to your butt that quickly, and with surprising ease, becomes a fullness penetrating deep inside your body. Your mother is back and clearly eager to resume using her beloved cocksleeve. You moan lamely into your pacifier as she pulls her cock out and slips it back in effortlessly, picking up her usual pace in only a few thrusts. Sarah mutes the tv so the sounds of sex can fill the room, and turns to face her mother, looking impressed.

"Wow! How did you shape Doug's butt to take you so easily, mom?" Your sister wonders.

"Oh, it's pretty simple," Mommy explains, never losing a beat in her thrusts, "I stretched him out by never letting him go for too long without my cock. When his butt clenches, I make sure something is there to keep it from closing, or keep him on his toes by slipping inside when he doesn't suspect it. That way his butt never feels safe enough to tighten up, and I have free entry whenever I want it."

Your mommy leans down to kiss you on the cheek. "Love you, cumdump honey..." *Mwah!*

Sarah's eyes are glowing with attention, making mental notes on what to do with the boy she gagged earlier.

"Yes, you should try the same with that boy you got. Maybe make him wear a buttplug whenever you're busy elsewhere, or loan him out to your older sister?"

Those are both good ideas, Sarah agrees, but the sex scene in front of her caused her mind to wander. She has currently forgotten her boytoy, focused instead on someone else's... her fucked brother.

"Mom? ...Can I try him again?"

Your mother's anal ministrations stop.

"Now now Sarah, Doug is mine. You and Crystal had your chance but were too mean, remember?"

"I said I was sorry..." Sarah insists meagerly. Judging by her expression, she doesn't really mean it, you think to yourself as your mother's cock goes back to pistoning into you, and you suckle on the pacifier to keep from losing your mind to pleasure again.

Your sister settles down and watches the two of you for half an hour, until she lights up with an idea.

"Oh! Mom, maybe you and I can have a competition! 'Who can fuck their boytoy hardest?' Bet'cha I'll win!"

Predictably, your mother is intrigued by the challenge and accepts it. As Sarah runs up to her room to bring her own fucktoy down to the living room, you lament your powerlessness over the women in your family for a few seconds, but are interrupted by the familiar feeling of your mother's seed spilling into and expanding your bowels. Once the flood ends, she bends over to lovingly wipe some sweat off your face and adjust your collar, before finally taking her cock out of your butt.

Sarah's fucktoy is led by a collar of his own and dumped onto the sofa, pacifier still gagging him and blushing, exhausted from all the sexual stimulation. You realise you probably look very similar right now, because Sarah clearly chose this boy as a substitute for you. He has the same haircut, eyes and nose. You ignore the fact he is also your height, despite the age difference.

"Whichever boy yells the loudest denotes the winner. The other boy is punished." Your mother declares, and Sarah nods, visibly excited.

"Whoever wins, we lose, eh?" The doppelganger mumbles through his pacifier. Well, at least his voice is different, you think.

You're lined up next to each other, kneeling on the sofa, stomachs over the edge of it, and after a short rest, the two ladies about to use you both for sport remove your pacifiers and enter their positions at your rears.

Ready...Set...Go!