The other option is for your mom and the other folks to simply decide that her "I'll take my ball and go home" threats are the SMALLER risk and to vote her out.
They can--there's absolutely no reason why they can't. Oh, if they don't want to confront her, they might need to wait for the next election and then claim "new blood for the good of the organization, to give other volunteers much needed leadership experience." And "giving her a much needed break."
She might end up hanging around, with her resources and everything, just because she'd lose so much face if she waltzed off in a snit.
How soon are elections?
But they need to get together and stick together.
Your mom can start this sort of campaign behind the scenes.
I agree w/ Camlan:
My experience has been that someone who rides roughshod over the rules, alienates volunteers enough to make them quit and indulges in financial irregularities does not do the organization any good over the long run.
You know she is lying about your mother and how she is "stealing the spotlight." What's to keep her from lying about her resources and abilities? While this woman may be getting some things done, it is possible that a different leader could accomplish more or do better.
When organizations I've belonged to finally oust people like this, two things are discovered. One, no one is irreplaceable. Two, the organization, after a short period of getting used to the new way things are being done, becomes better and stronger.
My co-op president is a bit like this--she has alienated a lot of us or discouraged us from stepping up to do more. We *can't* ask her to 'resign' (well we could ask her to resign as president, but she'll still be a resident), and there's a lot we don't do simply because it means dealing with her.
And, she likes to brag to us about how she saves us money by bargaining so hard, but I know of three specific instances in which she specifically, personally, has either cost us money or has driven away a contractor who would accomplish a tough job or give us a decent price. I oversaw a $2,200 electrical job that I originally had a bid for $800 on--the first electrician told me he didn't want it after all because she was nickel-and-diming us to death.
A friend of ours who did marble work stopped working for the building because he *wanted* to charge the co-op a "PITA" cost but knew it would backfire in the neighborhood. So he just won't work for us because he doesn't want to deal with her.
So she thinks she's so great--and don't get me wrong, she does a lot, tons more than she should have to--but she doesn't see (and so won't report) the ways she COSTS us. Financial and in terms of other people's not being willing to step up to the plate.
In our case, it *would* be true that our organization really needs other people to be willing to lead. And we could really benefit from the expansion of expertise, and from simply having a break from her. And she does deserve a break. But nobody wants to do it because they don't want to continue to deal with her as a building resident. And we also don't believe she's really willing to step down.
(We don't have any irregularities, etc., to deal with.)