Another girl

I’m female and 32 years old. It's Sunday morning and I woke in bed with a girl again. I met up with her a couple of weeks ago and this is the second time that we wake up together. In part I feel terribly guilty, about the things we did last night. She invited me into the bed by spreading her legs out and asking me to go down on her. I did that the last time we slept together.

I really don't understand the appeal, part of me felt it was gross looking at her naked wide open shaved pussy and part of me felt very erotic. She is 25 and she works as a cocktail restaurant close to my work. Playing in bed she likes to be hugged, cuddled, which leads me to hold her breasts, which she seems to really like.

We did kiss which I understand is the thing you should never do in any casual relationship.

Sounds fun. Where is the problem