Kimmerz, Do you know if the children have expressed their concerns to their father?
Yes, you should pay attention to what your children are telling you It's obvious that something has happened and it could be that the ow is there all of the time and he's actually not devoting his attention to them. The time may come when you need to have a "chat" w/him about the fact that they only want to spend one night, not two w/him and see if he can offer any insight as to why they are expressing their desires so strongly.
Sit quietly, the answers will reveal themselves when you least expect them to. The past is gone, the present is a gift and you need to focus on today, allow the future to reveal itself when it is ready.
