Is my cousin lez, bi or straight?

I was looking through her myspace pictures. (Stalker XD) and there was a picture of this girl and her and the comment she made was, I had ual intercoase with this girl in a kiddy play house and last night when she was at my house my twin cousins said go make out with your girlfriend and my cousin said maybe I will! I know its none of my business but just curious.