I think she was probably fed something along the lines of our marriage has been dead for years and to this day she thinks we are divorced, which causes confusion for the kids, because mum snd dad say different things. In reality she was a subject of our conversation for some time before i found explicit messages that he sent to her, the same day he ended it and the next day they met at a hotel.
I wouldnt be doing this for me, im happy to ignore her, i would only ever do it for my children. Ill try and smile at her next tome i see them and make a point of saying hello to both of them.
Let see if that settles the questions from the kids.