Hi Huddy , IMHO until she refuses to bring you the children I would hold back on doing anything It may just be W attempting to get a reaction out of you
You have to live it mate and it's very easy for me to have my opinion from afar.
I just keep thinking of your life compared to yours and I can see how she would have some resentment as she's the one that left but you appear to be accepting and moving forward with your life