The X moved in and out for several years pre-D and of course we have been D for 5 years. I never asked him do do anything when he moved out b/c I felt like at that point we had separate lives. We were no longer a team.
I myself did not have any children with The X so well he doesn't owe me anything.
I suppose if I did have kids with him - I have always been very independent - so it is unlikely I would want any contact with The X other than the minimum required with respect to kids. It is easier for me to just pay someone to do what needs to be done than deal with an X.
For me - once an R is over - it takes me awhile for me to let it go - but once I do - it is over and I have no expectations from the other person.
