No one is a mind reader and your partner may not have any idea where you draw these lines. As the relationship progresses, be very clear about your boundaries and don't be afraid to express them openly. You will likely gain some insight into your partner's probable reactions as you spend more time with her. Factor those into the way you approach your partner and always speak with their feelings in mind. But you should still be clear and resolute. Your partner should be able to understand your reasonable limitations and not try to threaten, manipulate, coerce or seduce you past them.