She doesn't move

"Oh, fuck, mmmm..." moans the girl on top of you.

You feel your childhood friend take your cock all the way to the base. Her intoxicating scent fills your nostrils. You feel a pang of regret at what feels like cheating on your girlfriend, until you realize that she was the very one who made this happen.

Although the pussy is warm, wet, and inviting, you can't help but feel its looseness. You can tell that this pussy has been well fucked. You realize your girlfriend is also this loose as well, that both of them have been physically changed to conform to Jason's cock, and that you are incapable of doing the same. While you feel a pang of humiliation, the fact that you were now balls deep in a girl you had a crush on, a nympho slut who's regularly fucking both your friend and girlfriend, while your slutty girlfriend spoons you from the side -- the hotness of what's happening fills you with a lust that overcomes any negative feelings.

After a minute of sitting there on your cock, you begin to get impatient, trying to thrust from below. She presses herself down harder, keeping you from moving inside her.

"Hold your horses, cowboy," she says in a tone that she always used during your platonic relationship, "we need to talk first."

"Okay," you say in confusion. You can't imagine what about. Lust is fogging your mind, and you're finding it difficult to process anything.

Jess continues, "At Jason's one night last weekend, we had a talk, the three of us. We asked each other what our biggest fetish was. Without any prior discussion, we all immediately agreed..."

Your girlfriend whispers into your ear the word simultaneously with Jess.

"Breeding."

Your cock jerks in response.

Jess giggles, "Jane, feels like he agrees. Just felt him perk up inside of me."

Jane laughs, "of course he does."

"Well, we got to talking, and realized that Jason can't really raise kids with his career path right now. Plus, I don't really want to be with him long term and Jane is, of course, with you. So instead, we roleplayed the rest of the weekend. By the end, we were obsessed with the idea. Then, Jane comes up with a plan."

You feel your girlfriend kiss you sweetly on the cheek.

Jess continues, her voice turning sultry, "We'd like you to raise our children. But Jason is going to breed us."

Your initial reaction of reflexive disgust and protest is disabled by the pleasure of suddenly feeling Jess fucking your cock. Her moans were deep and animalistic, convincing you that she was using you as a toy to get off on her fantasy of getting bred. Your girlfriend presses her tits against your chest as she kisses you like a high school slut, her tongue aggressively invading your mouth and fighting yours.

It's not long before you're about to come to a climax. Jess senses this and stops again.

"If you agree, you'll have both of us as your wives. And you'll be able to have this on a regular basis. But we'll also need the freedom to satisfy our desires."

Jane whispers into your ear, "Say yes, babe."