play-mixed feelings?

I'm 13, I went to me cousins house (shes 13 too) on the week end with my mom. Her dad is dead and our parents went out a night. We were sleeping in the same room and when we were changing into our pajamas she told me to stop after i had gotten completely naked she told me to lie on her bed and when I did she stared to rub and suck my , it felt really good so i didn't tell her to stop. Then she started to suck my . After she got naked and I did the same thing to her. Finally we started to masturbate in front of each other. When we finished I asked if we should have done this she said she dose it all the time with one of her friends. I don't know what too take from all of this, but I've been have mixed felling since (sometimes I fell like I might be a les. after all.