Yup it's always better to be safe than sorry. Do you ever wonder if she might be thinking the same thing about you?
Typically, as was brought up before this is all going to come out in the normal # date # isn't it? I just don't think your going to have a problem with it once you really get to know her.
However if your curiosity has you festering for an answer, just ask her. You know as in, "Hey I really want to fuck you somewhere down the line but I'm not going to get more than I bargained for am I?"