Told in 2nd person (you are Lisa)
After sex with Donny, you start to feel changes. Your legs are longer and are changoj color to a greenish tone. "WHAT THE FUCK!" You shout as you grow scales. You turn to don who says "i guesss you are gonna be a sssnake like me". Maybe this isn't such a bad thing. Your feet turn sidways and thin as your legs fuse. Scales crawl up to your boobs which are now one cup size bigger.
You amd donny fuck again and it is even better.
A few months later, the two of you decide to move to tge desert, where food is in surplus. "You look ssssexy today honey." You say as your husband brings home two rabbits fir dinner.