Further elaboration

You are both breathing extremely heavily now. If you had been stroking your cock you would have come easily.

"Obviously, we would just have to be completely honest and up front with my mom and sister. We can get the ball rolling in secret, but when it's time to completely commit, well, we'll just not beat around the bush. Either they will understand or they won't. Hopefully they will. Besides, the idea of being able to talk to my mom about the joys and trials of having huge boobs, being able to talk about bras and clothes and go shopping together, really turns me on. Fuck. Trying on one of my mom's custom sized bras and telling her it's too small would set me to jerking it a dozen times that night. Oh fuck."

That was almost enough to get you to explode. Only sheer **** of will was holding back your orgasm now.

"Wow. You've obviously put a lot of thought into this fantasy, haven't you..." said Carrie, trying to to climax herself. "I'm not sure you can get the size tits you want without implants, but we can broach that another time after seeing what the natural route does for you. I don't think that stuff works as well as you think, but we can start there. I am glad you want to keep your package, I would hate to see something that great go away." At this point, Carrie gets up and walks over to you standing there, her legs shaking with arousal. "What about in the bedroom? You make it sound like you would be completely accessible to me at any time, but what does that actually look like for sex? You still gonna fuck my ass and shoot your load on my face?" She ever so slowly reaches for your cock. The anticipation killing you.

"Oh fuck. I won't stop fucking you babe, ever, but I would also love to perform my wifely duties. You want me to eat you out while watching a movie, just say the word. I, oh fuck fuck, I have given this some thought and I would be willing to also be the woman in the bedroom. The mature woman, the woman who attends to what her spouse wants in the bedroom even if (hnnggh), even if that means you getting a strap on and penetrating me. Ohhhhh, the idea of being a sexually experienced mature woman would include having done plenty of anal I think, enough that I would (ahhhhh), probably be something of a size queen I think. Just imagining you vigorously pounding my ass with a huge dildo while my massive, mature, fat, leaking tits bounce... babe... oh god... gonna... gonna..."

She grabs your cock and you explode on her hand and leg with the most powerful orgasm you can remember, surprised at the amount of cum you still had in you. No longer able to stand, you sit down, trying to calm down and catch your breath as Carrie stands there, inspecting her hand before turning her attention to you. "Well, something you'll have to keep in mind is that I like to orgasm just as much as you do," Carrie lays down and spreads her legs, "now get to business, my fiance, we start tomorrow."

Somehow, almost impossibly, you feel yourself getting hard again.