Thank, you, sidious. From what I read, I couldn't tell either way.
It is possible that she was crying because of orgasm but I think she'd have told him that was the reason when he asked.
It's quite possible she wouldn't be able to articulate it. Intense hormonal shifts can do a lot to a person and leave that person at a loss to explain it, to the person's self and to others. To wit:
http://drruth.com/content/view/93/40/
As Kate Bush once sang, "I don't know why I'm crying."
And for fuck's sake, ladies, this is a rare thing experienced by a few women. What should astonish me--if I did not already know better--is how self-involved your responses to the concept have been, even down to the idea that the only way for a woman to reach orgasm is through direct clitoral stimulation. True for some, hardly for all. You don't cry during sex? Bully for you! I've already said it is a relatively rare phenomenon. But it is real. Google it (I suggest using "crying," "sex" and "orgasm" as keywords) and see how much stuff comes up. Unless, of course, you just want to keep smirking.