I have dealt with a similar situation as my ex married his affair partner. The stance I have taken is that the relationships he has or doesn't have are between him and the kids.

My oldest has very little to do with him. My 16 year old does do something's but refuses to go every other weekend to their house. Ex makes the girls go all the time that the agreement dictates. They have a love hate relationship with him.

I am there to listen and offer advice. If he asks for my take on something, I may let him know but make sure I am tactful. No reason to try and keep rehashing what happened, that is done. So for the last few years I have worked on getting the kids and I to a good place. Take what you have now and move forward.

kat

Me-53(and learning!)
S24, S21, D18, D17
Just keep swimming, Just keep swimming. Dory