Am I tripping or is my lover sleeping with his mom?

So I vented to my homegirls about this and they agreed with me. I don’t want to believe it but I have to trust my intuition:

I met this guy online and he was very charming. He has been financially providing for me since we met. I was having problems where I was staying at the time. He talked me into coming with him to a different state and move in with his mom. I’ve been noticing red flags since I’ve been here.

When I first got here, I found out that I had a sti. Around this time his mom says in conversation that “she’s too old to have an Obgyn” (she’s almost 80) Less than a week later, she asked me to take her to the doctors, and doesn’t tell me where she was going when I asked. I didn’t know it was an Obgyn until we got there. On the drive home, his mom makes a comment about how she had an Obgyn tell her that “everything looks good down there for her age, I can tell you haven’t been with a lot of people”. The she says “don’t tell my son what I told you” I said “why would I tell your son? And she made a weird face.

She makes comments about my clothing and she was kind of aggressive towards me when mentioning how I dressed, in front of her son. So I decided to not show skin anymore just to avoid the comments. I wore a fitted shirt one day and part of my belly would show when I walked. She asks me “why are you showing your stomach, when mini skirts came in style, I didn’t wear them” I just ignored her. I think that it’s weird that she’s so focused on what I wear. And she’s supposed to be legally blind. I think that’s weird.

I heard her make a flirtatious comment towards him before I walked in the room. She was like “you think you still got it” with a giggle. When I walked in the conversation stopped. I know what I heard and just made a mental note of it.

He made a comment about what she liked in bed. I thought that was strange because, how do you know that and how did you know why she was into it?

She also made a comment when her son passed me something to taste. She said “Don’t drink after her…”and I couldn’t understand the rest of what she said.

I know if I confront him about it, he’s going to deny deny deny and call me crazy. So im in the process of making an exit.