Yours is the first comment I've read in this list that actually makes sense. I would have reacted the same way. She was probably there just because of Jensen and if the girl never asked for her signature, I bet she felt awkward. The girl probably knew what she was thinking ('this girl here hates me just for dating you, she doesn't wanna my signature') but she never said anything to make Danneel think that it was ok if she signed it so I don't understand why all the complaining.
She didn't wanna her signature and Danneel knew it. She was probably just trying to be "nice" and say no herself so the girl didn't have to.

I'm guessing this comment is a mess but English is not my first language and I'm kind of pissed because of this story so I'm sure I've made a lot of mistakes. Sorry. ^^