You and Marty were out on a camping trip when you decided on going swimming in the local lagoon. Something bit Marty's leg while you were swimming, so the two of you edit it and get him wrapped up. But later, Marty is mutating into a monster. Scales from cover his skin, webbing strings between his fingers, fins grow along his forearms, gills grow on his neck. But now, he starts becoming female. She has gigantic boobs and child bearing hips. She also has s long tail. Marty(?):"Dude?! What happened to me?! I'm a monster!!