When and how did you guys tell your kids? Did you tell that that there were marriage problems before separation?
A few weeks before XW was scheduled to move out. We both sat down with them, explained that XW was moving out because she needed some space but that it had nothing to do with the kids and that we both still loved them and would be there for them and to support them no matter what happened. We explained logistics to them, that they would have rooms at my house and XW's, that they would still go to the same school, that they would come home to my house after school on her weeks, etc. etc. We assured them that the change to their lives would be as minimal as we could make it other than them living with her in a different house every other week. We did not get into why we were separating and we did not mention a future divorce. Kids don't seem to be interested in explanations, they are more worried about logistics and they are irrationally afraid that the split is their fault. So that was our focus.
EDIT- just noticed you're over 10 pages, time for a new thread!