It's a little puzzling and i don't think i understand.
You mentioned that you are an officer of the guild, but you don't think there are any by-laws of the guild.....if you do not have by-laws - does the VP actually have any responsibilities??....are the responsibilities of the other officers outlined somewhere?....are there agreed codes of conduct for within the guild? If not, i guess i'm asking how is she not doing her duty if her duty is not spelled out....and how would her not being the VP but just being a member change the behavior that is objectionable within the guild??
I think if you want to have recourse for the kind behavior you're talking about, you would need to have some kind of code of conduct/behavior or by-laws for the group that everyone agrees on.
Good luck.