I can’t wash my own clothes??

So I came back home from a date with my boyfriend (I still live with my parents and I’m 23). So I had pile of clothes that needed to be washed. So I went on ahead and washed them. So my mom came to me and asks me why am I washing my own clothes. I was like I’ve been washing my own clothes. ( I do sometimes tbh.) I guess she didn’t believe me and then she said “Im going to stick a pin in that.” I was very confused on why my mom wanted to start something. I guess she believes I am having sex. Which I am but I can’t tell her I am because she will

Make me stop seeing my BF and make me feel guilty for having sex before marriage. But anyway I hate I have to hide things from my mom like I’m a teenager because how she acts towards things. Little things too. My mom wants to have that good relationship but y’all I just can’t come to her at least 90% honest because how she over reacts to things. I want to move in with my boyfriend. But I know she is not going to approve of that.