How do I stop my sister from becoming a ?
I am 20; my sister is 13. I've just gotten back from college this summer and am spending most of the summer at my family's home. My family is pretty conservative, but not overbearing. We're not allowed to go on dates alone until we're 16, drinking is okay under 21 as long as you're at home with your family, etc etc.
Last week I was sitting near my sister's phone while she was in the pool and a text came through and flashed on the screen from a boy. "Hoho, interesting," I thought, and scrolled through it. He was telling her how much he loved her and how he wanted to do what they had done at school again and again. I wanted to find out exactly what they had done at school so I read through her messages and discovered not only had she been to third base with this boy, she was also double-timing him with another.
I handed over her phone to my mom and told her what was up. Mom responded by taking the phone away and yelling at her for a while. That's all.
However, despite my sister's being found out and her punishment, she still continues to act like...well, a skank. She's stealing my bikinis and my clothes to take to the pool with her 'friends' (boys, since my parents are oblivious), she's sneaking out at night, etc.
My parents have 'talked' to her before (meaning they've listened as she fed them bull about how sorry she is for disobeying them and how it's a misunderstanding), but obviously she isn't listening. I don't want my sister to become a .
How do I stop my sister from becoming a full-blown ?