Don't feel bad Spoo! One time, we were playing with one of our play couples after a great night of dinner and drinking (we think we can party like rock stars). All of a sudden, the lady leaves the room. Her husband goes after her, comes back and basically shoos us away to our own room. We were miffed. We thought it was rude that she didn't just tell us that she didn't want to play. We though perhaps we'd done something wrong. The next morning, we found out the ugly truth....the tequilla we'd had while we thought we could party like rock stars, or at least like college kids, didn't agree with her so much and she'd made a fast break to go pray to the porcelian god.
In another situation, we were all set to play, but the lady of the other couple took a moment to go to the restroom, saw that her period had started, and called the whole thing off. We didn't find out her reason for hasty retreat until after we'd developed a complex about it either.
There could be a billion reasons why things didn't continue in your situation and unless she screamed, pointed, laughed uncontrollably or flat-out said she didn't want anything to do with you, I wouldn't necessarily think it was you, although I do understand it's easy to jump to that conclusion. Chin up!
Pepper