I think the most salient think Debunkt said in his post was if you can't talk about sex with her, you probably shouldn't be having it with her. Although I'm picking up on your sense that she seems to be rushing the sex thing a little much, I'd take some one-on-one time with her and, when it started to get heated, I'd start asking questions. Like: Where does she want all this to lead?

Without meaning to bust any bubbles, I feel compelled to also say that it's been my experience women can be a lot more clinical about their virginity than a man can about his. A woman can select a man with whom she wants to lose her virginity and thats all. Nothing more. Maybe she's rushing it because she's on a schedule. She's picked you to lose it to and has only so much time to do it in.