With matters of the heart Jez I think you need to think about a few points. The start of any new relationship, whether its with someone you have known a while, or with a whole new person carries uncertainties. It is only natural to have concerns when finding things out about other people, but I have always found that speaking to them about it will either allay any fears, or confirm them, thus leaving you in a stronger position to follow whichever avenue you choose.
In this particular situation I think its important to think about the following, as it is not strictly speaking going to be like any other relationships you may have had:
First, self esteem. Yours and hers. Are you going to be happy with your girlfriend being ogled by other men, and as someone said above, often in a situation, albeit controlled, where she is wearing very little. You say she is confident, however is this as a result of her work, or a reaction to it?
Secondly, the future. If this relationship blossoms and grows, are you going to be able to leave this episode of her life behind you. Kids ask a lot of questions, people in the area will be aware of her and her past, there will be customers, fellow workers etc constantly reminding you both, and potentially causing harm.
Thirdly, and perhaps most importantly, the question I always ask myself whenever embarking on a new chapter of love: will she take it up the ronson?