I don't claim to be an expert on this kind of thing .. and I know that crying before, during or after sex is a no-no, however I did it earlier this year.
It was during VERY rare and intense LM and I found myself weeping because it had been so long, it felt so good and I felt such a wonderful connection with my 'better' half (aussie slang for partner).
Just thought I would throw my 2 cents worth in, I would hate to think that it was because of any sinester issues with her past.