Replying to Walk in on ma

So my mom dragged me to her new boyfriends house to hang out with them. Started watching straight outta Compton, pretty chill at this point...but I leave to take a phone call. So I slink back into he room, as to not interrupt the movie, and thought they saw I was back. I hear them saying "oh she probably is going to bed soon" and didn't think much of it. A few minutes go by and some grunting starts going on. This bitch is giving her bf a handy. So I fucking panic dude. I didn't know what to do so I take the water bottle I have and throw it at the ground. Noise stops and I hear "omg she is here". I pretend I heard nothing or saw nothing for a bit and then leave to go back upstairs. Planning on having a semi-awkward breakfast with them tomorrow and scooting out of the house shortly after. Any stories similar? Worse? Make me feel better ns.