AIO by telling my husband to see a therapist after I caught him jerking off by peeping in my mother's room when she was changing?

EDIT: This has been an overwhelming experience for me posting this. Everyone is telling me that I am not getting the severity and should leave him or tell my mom. I'm going into a downward spiral of thinking that maybe if I gave in to his fantasies earl8, he might not have turned this way. I know it's probably not right to think this. But it keeps coming to my mind all the time I rejected the things he suggested in bed. It's time for me to go home from work now and I feel like a 1000kg stone on my chest.

I'm 26F and he's 27M. This happened when my mom was staying with us for a while. My dad passed away druing covid before I married my husband, so my mother stays with us and my siblings alternatively.

I haven't told my parents or his parents about this yet. But I'm very very angry and shattered.

He says it's normal for guys to have such thoughts about females, even relatives. Idk what to do. He acts like nothing happened.

I know I shouldn't have, but I went through his phone secretly the next day and found a hell lot of a mother-in-law p*rn(some of it non-consensual category).

I have been thinking if I don't satisfy him physically. I am kind of conservative when it comes to all this stuff. He says that because I don't do things he wants me to do he has to look for other outlets. He keeps making a point that he was just watching and didn't do anything.

I work from the office and he works from home so I was scared when I left home this morning.