is my mother sexually harassing me? what would you call this behavior?

I’m 16 and when i was little i was raped by my grandfather, something which i soon after told my mother and had him reported for. I’m now struggling with PTSD so i’m really wondering if my current situation feels more exaggerated because of that.

Basically, my mother (who became a raging alcoholic after her fathers actions) has for some reason deemed it okay to talk about her and my fathers sex life with me despite me giving little response and looking obviously uninterested. Her and my father were going away to an event for a weekend and when her and i were alone she made a suggestive joke about how she’s going to be alone with my dad and started winking/making weird faces at me.

Additionally, there have now been multiple instances (over the past two years) in which she was intoxicated and openly talked my dad into leaving to have sex right infront of me and my brother.

My mother has always been one of those touchy types and was one of the moms who always insisted on me being naked around her and stuff and would constantly close me in her room when she was getting dressed and would get completely naked and encourage me to look at her body even after i told her i didn’t want to (when i was around elementary age, post assault).

I’m already a bit sex-averse so maybe it’s making the situation seem worse to me but i don’t know. The thing i really don’t understand is why she would do all of this especially knowing that i was raped by a family member. Anyways, what would you guys call this? Is it sexual harassment or just her being a weirdo?