Now that she and you are talking about an open marriage, you might try something I thought might be fun and a good way to explore each other's desires. Each of you should write 5 (more or less) sexual fantasies on pieces of paper. You can rank them 1-5, with #1 being the least adventurous. Then you and her exchange the slips of paper starting with #1, talk about why the fantasies turn you on, whether you are willing to make them happen, discuss scenarios, how to make them realities, etc. This might be a good way to get everything out in the open and move toward making things really happen. You might find that you have similar desires.