guy screws mother

So, obviously, I am a deputy sheriff. I know a guy that is always in jail that was found having sex with his step-mother. I have to take a report from him, and find that his biological mother has stolen his car while he was in jail and stripped it for parts. He wants to press charges against her, so I go and arrest her for a felony car theft. When he asks what I thought about it, I asked him how it felt to screw both of his mothers. Is that bad? :)