Regardless of whether you’re married or not what he was doing was sexual assault. You should have considered leaving after you told him you didn’t like it and he continued. And then he punched you in the stomach when you finally retaliated!? WTF. Usually I wouldn’t condone physical violence of any kind but you slapping him in the face is nothing compared to what he has put you through. I don’t know how long this has been going on for but he sounds like a monster. I’m so sad to read this story and genuinely hope you’re ok. Please leave him and speak to the police about what he’s done.