My Best Friends Brother

Sienna Collins is a typical teenage girl. Soon to be 18. She has never had a boyfriend and her brother has made sure of that. Yes, an over protective brother. Sure, she has the looks and attitude, the guys love her. The only problem is that her brother warns all the guys off and he even has his Friend aka. Sienna's Best Friends Brother watching her every move when it comes to guys. Sienna warns her best friends brother to stay out of it, but he is persistent in keeping the guys away. Why?