Idk what to do

So I don’t really have a problem with my boyfriend watching porn. I recently find out that he has been paying to see someone’s onlyfans and it bothers me because we are struggling financially. He’s also been hiding it from me using a card that I didn’t even know excited and won’t show me what it is because he doesn’t want me to know what kind of stuff he’s watching. I said to him that’s it’s not ok and that there is plenty of free porn online. He goes to me and says “it’s either you send me more pictures or I’ll have to get premium stuff because I’m not interested in any of the free ones.” And I’m just really upset because I don’t want him buying anything when we don’t really have the money but I feel bad because I don’t have time to take pictures with having the baby. I also don’t understand how he can’t find anything that’s free. Also really upset that he kept a whole card without telling me that actual has a pretty large amount due on it. I told him I wouldn’t keep bugging him about it after we talked about it that night. But I feel like it’s an important thing to discuss.