Write a fictional first person narrative that has a man named NAME_1 swap genitals with his wife named NAME_2 while having sex by magic. It turns out his wife had caught NAME_1 cheating and wanted him to suffer and feel what it was like to be fucked by his own penis. As NAME_2 orgasmed inside him she tells him it’s permanent and not only that but he will slowly change fully into a woman. She leaves him to suffer after that never talking to NAME_1 again taking his penis and testicles with her.