She'll let you know when she wants sex. Do not force her. Before long she'll fall in love with you because you're a man who treats her with respect. Believe me, even a prostitute likes to be treated like a lady. Tell her she is pretty and that she's nice to be with.
Women love compliments.
Do not ever flirt with other women when you're on a date. The girl you're with should get all your attention. But do not be a doormat either. If she flirts with a lot of men or talks about all her boyfriends, don't take her out again. If you treat her with respect she should treat you with respect.