While his wife's daughter was taking a bath... he could have sex with his stepdaughter anytime, anywhere, and then continuously ejaculate inside her. Live-action version: Hoshino Natsuki MUDR-244

As he grew into a more attractive woman, he could only see her as a sexual object and had to force himself on her. Unexpectedly, they developed feelings for each other! No matter how late he got home from get off work, his wife would be asleep, and he would eventually have sex with her while she was taking a shower!