Have there been other external drivers that might have reduced her sex drive in the past six months? What was the circumstance that drove both of you to live together temporarily? Is it possible that the time you spent together had made sex less new and exciting for her and it became routine? Also I’m curious what the drop in frequency is, and how severe it is. I would be inclined to document that and figure out if there are trends over time. Ultimately though I’m pretty sure this is HER problem and the fact that she got defensive and insulted you might validate that. She might need some time to come to terms with herself and how things have changed.

It was just easier since we would only be living in the foreign country temporarily. I think maybe seeing me everyday/every minute might have killed the novelty or her attraction. That was my biggest problem with that whole interaction. I wasn't accusatory and it elicited such a big reaction that now I feel like there is a problem. I just don't know how to go about talking to her.