WIBTAH if I ask my step dad and mom to stop having sex?

I (18F) have very recently found out that my mom and dad have not been together for over a year. My mom (44F) has recently got together with my step dad (45M) a year ago as soon as her and my father have split.

It’s important to note that me and my mother have cried numerous times over this matter. I kept asking her about my step dad and how everything happened and why she took a year to tell me. I have been trying not to cry every time my father visits as he lives somewhere else. My mom was also a child of divorce and talked to me about her own experiences.

She’s been very supportive of it taking so long for me to come around - it’s taken me about 6 months to actually not cry when he’s around. I love my step dad and my mom but I don’t feel like crying every night when I hear it especially at midnight when I wake up at 5am to go to class. I had been really stressed by it all that in numerous occasions with the situation if it went wrong or it was something I didn’t want to hear I left to go see friends and started crying about it.

I am really stuck.

I’ve tried saying to her that “hey I heard you” last night and she lied and said they were “arguing” however I knew what I heard. I’ve never felt so lost especially as all the people I’m surrounded by don’t have sexually active parents let alone step dads. It’s also worth noting that he’s spent a lot of time at my home overnight. I don’t find myself being able to sleep anymore and have even considered earplugs which didn’t help or magnesium pills.

I’ve never been around anyone so sexually active and whenever I hear I start shaking and crying especially as there has been times it’s been numerous nights in a row where I’ve got maximum 3 hours sleep.

It’s also worth noting that so far this week they’ve talked about moving homes when I move out yet won’t be until the age of 21 due to educational reasons.

I’ve spoken to my boyfriend (18M) and he can’t help at all. Neither can anyone else. I’m extremely new to this and I hate hearing it all night.

I’d happily appreciate help as it’s a very weird situation that I can’t even wrap my head around.