... leaps to her feet, slides her pussy right onto your dick, moans, and bites your lip.
"No no no!" you attempt to protest. She laughs, humping your cock as she presses forward and seals her lips to your own. The feeling is incredible and you are moments away from cumming right then and there.
She pulls her face back, grinning. "See? I guess your curse was no match for my eeeEEEP!"
Your girlfriend shrieks as her feet raise up off the ground and her head sinks down the front of your body. All of her limbs retract and you mournfully watch as her once-sexy body morphs and shrinks into a lumpy green blob of a body. Her mouth enlarges and her eyes move to the side of her head as all her hair falls out.
You groan at the feeling of her pussy shrinking on your dick. It forces her upwards, finally raising her up to the top of your cock. At this point she has shrunk to a mere five inches long. A tiny toad perched on the top of your rock-hard dick.
"Noooo..." you moan. The toad panics and makes a squeaking sound. It tries to jump but fails, falling to the ground between your legs. Your former girlfriend falls on her back and looks up, horrified to see your enormous cock floating above her, now nearly twice the size of her own body. She trembles in fear and shock, unsure what to do.
You stare down at her, also unsure.