With an article like this one, where the reporter had to seek out the woman being interviewed, I can't tell how much is the bride just venting a little frustration at not knowing if Chelsea's wedding will be there or not and not being able to get any definite answer so that she can start to make alternate plans if she needs to (I know the uncertainty would be really, really bothering me). Or how much of this is a reporter looking for a story and grabbing at the "she ruined my wedding" angle and asking the bride to be leading questions and very carefully editing her replies to create a more interesting story--one that people will read and tell others about, so that more people come to read it.
Trying to read between the lines, I'm going with pretty sensible bride to be, reporter asking leading questions, and a good editor. The bride really doesn't come off as a huge bridezilla to me. She sounds more upset with the uncertainty than anything else.