My stepdad stands at my bedroom door and listens in?

My mum has just told me to be careful what I do or say cause apparently she's seen my stepdad standing at my bedroom door, listening in. They've been together for a year and we all live together (my mum, brother, my stepdads kids and him), and to be fair, I find it hard to like him. He can treat my mum and us like real shit sometimes.

I am so freaked out. What kinda adult man, with kids of his own, listens into the bedroom of a 16yr old girl? God knows what I could be doing. What is he hoping to hear? It's creeping me the hell out and I don't know what to do. I do stuff (that kinda stuff) with my boyfriend, i do that stuff to myself and i do it with him on call. Along with the jokes i make to my boyfriend sometimes which can be very misinterpreted, and the private stuff i tell people in there. what the hell has he heard.
My stepdad stands at my bedroom door and listens in?
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