Is it wrong to have an OnlyFans while is a relationship?

So I’m married and in college right now, not currently working. My husband has been paying everything while I’m in school but I want my own money. I’ve always been independent. So I made an OnlyFans to get some extra cash until I graduate. My husband found out about it and we’ve been arguing for 3 days straight we’ve even mentioned divorce. I’m just so confused why he’s so angry. He’s never been the controlling type and always been supportive. He never makes comments about what I wear in public or if I go to the bar with my friends. He’s just not that type and that’s why I’m so puzzled why he is acting like this? No I didn’t ask for “permission” before making the account because for one I’m grown and for two it’s my body, not his. And I always send him the picture I’m going to post first it’s not like other people are seeing them and he didn’t.