I think she just realized she liked to fuck and wondered why she waited all her life to do it. I think the natural reaction would be "hmm, I wonder what fucking THAT guy would be like". I mean damn, you wait your whole life, then get a taste of it, of course you want to go out and get more. Especially a girl like her who can more or less get who she wants (except me of course...). I saw this coming from day one, I guesss If Nick was smart he would have made sex pretty bad because she would have never known different and wouldn't have gotten the urge to go find more. I think she wanted to find out what great cock felt like...