Fight fire with fire. If she has something to say, hex her.

Seriously though, it's not an easy position, and I totally understand, so hugs. All I can suggest is that, if she does have something to say, ignore her, and if that isn't an option, rip her little argument to shreds - I've known you on forum for long enough to know you are more than knowledgeable and capable of doing that.

Blessed Be and good luck Shades,
~Simone.