To quote Ronald Maximus: "Trust, but verify."
I travel long stretches at a time to bizarre countries. I'm a successful businessman, reasonably tall, and fit. Women do pursue me, even though I am not terribly approachable. They are often extremely aggressive (by which I mean they make clear they are available) during business travel, especially international travel.
I grew up in a culture that stressed that one must not only not sin, but not give the appearance of sinning, as by doing so you could leave others to stray. So I worry that she worries (although she says she does not).
Mrs. Jewbacca has access to every credit card, bank account, phone, and computer that I own. I follow certain cultural norms that act as a back stop to bad actions. I call often. She can track my phone if she wishes. We skype. I try to travel with like-minded male companions that she knows. I've at least introduced her to my traveling companions and given each their respective contact information. I try to avoid alcohol where possible (not really possible in Asia). I do have the advantage that I can plead religious conviction to not attend certain clubs popular with businessmen in Japan without being rude (and Dallas). Etc.
While obviously being observantly Jewish is not the solution for anyone but a Jewish person, perhaps others can take some pointers both to avoid temptation and to avoid the appearance of impropriety.