First off, I'm 20 and my sister is 18 years old. She has had boyfriends in the past but not that many. She has always been just good friends with guys. Just recently she changed her info on facebook to being interested in.... men and women. She talks to this girl all the time and acts really weird about it. She never says anything about her to me or to my family. Normally she would mention things about her new "friend". I can totally tell that she is bi or interested in girls. I have caught her on this website called "Connexion"; I guess it's for gay men and women to "connect". She hasn't told me any of this, I am just worried about it and have investigated it myself. I have absolutely nothing against bi/gay people (I am friends with SO many bi and gay people); I guess I'm just afraid about my sister being bi or gay. How should I talk to her for the first time about this?