Is my mom going crazy??

Soo I’m 22 pregnant with my second son... my mom and I don’t live together but we live in the same apartment complex.

In January my moms husband (now ex-husband) was sleeping on my couch because they were having issues in their marriage. They’ve been married since I was in middle school so I looked at him as my stepdad.

He was in prison for a couple years and he got out in 2018. So when he came back he was sleeping on the couch AGAIN. He would come in my room in the middle of the night and say that he was just checking on me and my son. I’m 20 years old (at the time). I don’t need anybody to check up on me or my son. I could’ve been naked or something. He wasn’t there much so it didn’t bother me too much. BUT one day I asked him to kill a bug because I couldn’t reach it. Whenever he came in my room he exposed himself to me. I thought maybe it was an accident and I didn’t make much of it because I could tell that he knew it made me uncomfortable. He opened his boxers on the flap part. I thought maybe he was scratching down there. I really didn’t think he was like that. He hit the bug and it ran away whatever. I live in Texas.

The next night the bug came back out and he came in my room and exposed himself to me AGAIN. So I told my mom what happened and she says “well you’re grown now” I’m sorry what? That doesn’t make it right. He would make remarks in front of my mom saying “you’re busting out of your jeans” and he would watch me walk by.

Two days after I told my mom and my family about it he left. He left in the middle of the night saying that he found somebody else and I was glad that he left not mention he stole my grandma’s car and set it on fire. But now he’s back. I told her how I felt about it because she asked and she said “I’m not bringing him around so you won’t feel disrespected” so they went and got a hotel room. I feel bad for my mom because she has bipolar and she doesn’t make the best decisions. She’s blind to everything that’s going on. I told her the boyfriend she had after him was on drugs and she didn’t believe me and he beat her up..

I don’t care what my mom does with her love life but I don’t have many people to talk to about it. She’s setting herself up for failure but it is what it is