Sticky situation

[tridgirl]

I work at a summer camp and I love going every summer and having a blast with the kids and the awesome staff. I was talking about it one day to one of my sisters I didn't know very well. She was interested so I refered her, she applied and has interviewed with my boss. She is very excited about it, but i am having my doubts. Recently I have noticed that she pretends to be very innocent, but does VERY questionable things in publice places, like fraternity formals and doesn't think about how it reflects on her. She also had the tendecy to talk behind people back, tell private information and misrepresent what you say to other people. I worried that her behavior will reflect on me this summer, I certainly won't want to hang out with her if she acts this way around my close friends. I don't know what to do, talk to her, email my boss and explain, I feel like I am back stabbing her, but I refered her before I realized the type of person she can be. Any advice would be awesome.