Mommy Insists

Dana's next orgasm takes her arms out from under her, something Erin had apparently anticipated, because she almost immediately has a cushion for Dana to slump her torso onto. The thought - no, the reality! - of your sweet little Dana in the famous face-down ass-up position makes you redouble your efforts. You hook your hands around her hips, using the increased leverage this gives you to pound your sister even harder. Dana, meanwhile, has reached back to her clit, furiously rubbing to match your thrusting.

Just as you feel the tell-tale signs of your imminent orgasm, you mother - suddenly topless, you realize - is at your side, her hand on the small of your back.

"Oooh! You're fucking Dana's baby-hole so good, John! Look at how much she wants you to fill. her. up. Eeeeeeeee! I think she wants a baby! Dana wants to make me a grandmother! Oh, Dana, sweetie, you're making me so happy I could burst!"

The moment Erin said the magic word - baby - Dana comes harder than ever before, clenching down so hard you're worried her pussy's going to rip off your dick.

"Oh, you'll make an amazing mommy, honey. You're going to love being pregnant, and then nursing a little baby of your own. Oh, please, make her a mommy John! Knock her up! Breed your baby sister!"

You turn your head, intending to ask whether you get a say in this (you're not exactly opposed to this; frankly, you're undecided, it's more the principle of the thing), only to be met by your mother's breast. Her nipple finds its way into your mouth, and you instinctively begin to suck it.

"Oh, look, sweetie! John is so excited he's already suckling me!" Still filming, she uses her free hand to push you deeper and deeper until, overwhelmed, you give up. Hilting yourself in your sister's spasming pussy, you roar as you shoot jet after jet of cum deep inside Dana's unprotected womb. Dana's so tight that you can feel your cum rising up until it begins to dribble out around your still-twitching dick. Your baby-hungry mother shouts with glee when she sees this, and brings the still recording phone in for a close-up.

"Oh my God you really filled her up, John. Maybe you gave her twins! Oh fuck, I think I want a baby now, too."

As your dick softens (only somewhat - was that one of the "augmentations" the ... thing(?) gave you?), your mind starts catching up with what just happened: you deflowered your younger sister, Dana, on video, in front of your mother. Not content with that, you pumped probably the biggest load you ever made as far inside of her as possible, potentially impregnating your sister, at your mother's urging. And, most surprisingly of all, you feel relatively fine with this.

In the calm, post-climax clarity, you ponder what else you should do with your day. Erin is fully available, and you're still at half-mast. Or perhaps you want to set out to claim someone outside of your family? Another voice in your mind says you should sit down and do some thinking.