Hmm. I've mentioned this only a few times before at a2k since it's more personal than usual, that I had a spell of absolutely no libido once. It was directly after I took a shot to close down my estrogen before a fibroid surgery. The surgery was a breeze but I felt very strange for weeks after, so much not me, sexually. It turned out that the shot also shut down testosterone (women have some, just like men have some estrogen, and both need those amounts). My estrogen had come right on back, but the testosterone needed a kick.
The doc put me on birth control pills that had a tad of testosterone in them, and I perked right up. After we/I stopped that new pill, I still remained my normal old self.
Not knowing her earlier problems (not our business), I can't guess if this is related, but it might be.