Dito what the others have said. These rules are reassuring to her and the most important thing you can do at this stage is support her by swearing an oath that you'll stick to them (and then DO that!) My guess is that as you have more experiences, you'll modify those rules a bit and she may surprise you as time goes by. The old saying is, "Men may be the ones to initiate swinging, but it's the women that keep it going."
You need to let her be cautious right now, or things may stop altogether. Patience.
-B