Ailz rings her mother every day and gets met with a barrage of snark and self pity. Dot is desperately jealous that we're down here paying attention to my mother and not up there paying attention to her. I stood in for Ailz the other day and got a taste of what she's up against. It was nasty. So I put on my shining imaginary cricket whites and protective gear. The way to deal with such people is to think of them as tricksy spin bowlers and go forward to them and block everything they send down.
And, maybe, every once in a while, sweep them to the boundary.
Ailz's word for her mother's behaviour is "dishonourable". I can't think of a better.