Personally, all I am trying to do is not do anything I know could potentially make me feel like crap- sounds like this would be one of those I would **try** to avoid. But, good grief, haven't we all slipped up? Don't beat yourself up, you are still a rock star at DBing. I wish I had your discipline.
I know its crazy hard, but don't let your mind go there- it could be just as likely that she ran into an old friend. I have actually met an old (male) friend there, too- nothing shady going on, either.