Uhm, as a female myself, if that ever happened to me (thank the gods it hasn't as yet) I sure would feel rather embarrased even though it is a natural thing, but like one or two others said, I am sure it wasn't intentional - so don't be so hard on her, geez, it could happen to anyone!
About the losing trust thing... that's just plain silly dude. Come'on... Sounds like it was a one night stand cos in my opinion, if u r with someone u love, that kinda thing really shouldn't matter... after all, it's all about enjoying each other completely..