i have no privacy :(

i’ve been masturbating for a long time and i used to keep my door unlocked and my mom constantly would walk in on me and say that i’m gross, only boys do that, and that good girls don’t “play with themself”. well i locked my door today and she keeps on knocking at my door and asks why i locked it. i lied and said i was changing and she said she wasn’t stupid. idk what she wants. i don’t want to stop masturbating. it’s my body anyways.