EX left me for OW, for 3.5 yrs they were together it was hell on earth and our DCs suffered massively. Exclusion from their fathers life, emotional abuse on the few days they did go to his new home and worse.
WE could just about have a conversation about them but usually involved him telling me I was unreasonable if I asked him what weekend he was going to have them, were they going to see him on his or their birthday etc.
Last year, he left her. OMG - we talk, discuss, he comes around to see the DCS, takes them out, they are still very wary of staying ON incase she turns up. Mothers Day b days special days remembered - turns to school stuff, has read their school reports for the first time ever - it is so much better for all concerned.
His family have been so supportive of me and the DCS during the bad years, where he also stopped all contact with them as OW tied to dicatate who they could be friends with, who visited. In the last year, he has been repairing bridges with his family and I am so happy for him, his family were never rude to her, just refused to be bullied in dropping a frinedship after 18 yrs.
This is good - the before was so awful, I would hate to return to it.
It was what I always wanted once he left and now we have - the stress removed is unbelievable.