His ex is allowed to call every other night and see the kids on Friday/the weekend. Every other day when she talks to the kids, she says ":)o you know what day this is? And how many days until Friday? And what's Friday? It's going to be soo much fun! I can't wait to see you, just X more days to see you and we are going to have so, so, so, much fun!" The situation has become a problem as now the boys see the time spent with their father as a prison sentence and that their mother is helping them see the light at the end of the tunnel.
Disneyland mom syndrome
Annoying? Yes. Parental alienation? No.
He has custody and she is competing for their affection. The problem is that this is no different than if a grandmother did it. I think the best thing to do is just go with it and don't let the kids see you competing for their approval.
It's a marathon... .