Need advice.. idk if I’m overreacting 😔

This happened few days ago, My boyfriend stopped by to see me at midnight we were outside when I realized my bedroom lights were on which I had turned off & also locked my bedroom door. It seemed off to me so I decided to see who was in my bedroom as soon as I go in my step dad came out of my room, fast... it all happened so fast but I was able to see that he was watching porn on his phone & had an obvious boner!! My heart was racing I was extremely afraid for some reason. When I went into my room I found lubricant & a used condom. I immediately locked my door again & went straight to my bf. I called my mom & she told me to go back inside & take pictures of the stuff he had left in my room. I went back & guess what? He had went inside my LOCKED room again & took all the evidence I was extremely heated at this point so I just left my home & haven’t been back since.

My mom called me & told me he wants to apologize & feels extremely embarrassed. I’m upset, but more upset with my mom because she wants me to talk to him. She doesn’t seem upset about the whole situation.

Any advice?😔