My Fantasy

I'm an 18 year old girl. I'm straight, well my sexuality confuses me. My cousins boyfriend has an old sister who's in her 30's. She is bi-sexual. I want very badly to f*** her. I want her to go down on me and make me c** everywhere. She's not very attractive, but something about her just turns me on. I've never had a relationship with anther girl, but if I were to I'd wish it was her....