my sister is having sex with another girl
Okay so here's the deal. I'm not sure what to do about this.
My mom gets home from work at 7pm every night, and on fridays has to work until 10pm, our dad isn't around. I usually work nights (I'm 18 and in high school so I can only work after school).
I was supposed to work from 4-9:30pm friday night. We were super dead and my manager sent me home way early at 6pm.
My sister usually stays at a friends house until my mom or me are home or just sits around at our house. I heard her and someone else in her bedroom. I just looked in (we aren't like, really private) but I saw my sister laying on the bed naked with her friend on top of her naked and having sex. Neither of them saw me as jumped back as soon as I saw.
I then just made a bunch of noise in the kitchen so they knew I was home and I could hear scrambling, and they came downstairs acting like nothing..
I'm just really confused and concerned. Should I tell my mom? My sister is only 13 and I don't know what could of caused this.
I don't know whether to confront her myself or tell my mom. What can I say to my sister? I just think she's too young to do stuff like this. And I don't want to see my mom freak out or anything.. It freaks me out even more its with another girl.. I'm not homophobic or anything but my sister is talks about boys and how she thinks this and that boy is cute.. never anything to suggest she's been doing this.
is it normal for girls this age to do this kind of stuff? I sure didnt when i was that young..