I also think you may be onto something there...Crusty nix = Grace/mags/Witch Jen.
Just a theory. Mags very quick on to the engage in the row and suit Grace's narrative. She's clinging on for dear life with followers falling and no engagement.
What's the one tried and trusted thing that works for Grace? Bullying and the sympathy it gets.
Mad Dog Mags wouldn't have the cop on to think oh this mightn't look good, full on slagging on what is essentially her sister's - she didn't do Grace any favours by agreeing that Grace had a crispy fanny (but it's all cleared now! ) and pointing out that she doesnt' have 175,000 followers, only 174,000