Your sister

Gemma, throughly inseminated smiles lovingly up at you. "I've never been happier then I am right now" she tells you. You place a pillow under her beautiful ass, so that none of your cum leaks out. You smile at your image of Gemma 6 months from now, prancing around the house naked, proudly displaying what you've done to your childhood best friend's once svelte figure.

A feminine moan grabs your attention and you watch your sister in action as she goes down on Rachel, Sharon slowly fingering herself as she watches. An even hotter image replaces the one of a pregnant Gemma, that of your lesbian sister 69ing with Gemma, their round stomachs mashing against each other. Large tits spraying milk. The image is so arousing that your cock is hard once again, and you know that you have to fuck your sister next. The only question is how.