My mom unlocked my door and caught me masturb@ting, how should i tell her not to do it again ?

I was doing my thing, took the usual precautions, locked the door, covered and listened and my mom just unlucked my door and barged in. I feel like she violated my privacy and some kind of shame. I feel really bad and i DO NOT want to talk to her but i wanna make sure she doesnt do it again.