I meant that she was probably expecting the joint and probably will try and ask for it for this as well. The split lets her experience the loss of the kids for one or the other day. Thats good. The co-family time hasn't had the desired affect on her so the reverse is in order...I think. Ying and Yang so to speak.
As for the calls from the kids. If she doesn't remind them to call then you don't either. If kid A leaves a book a school then don't volunteer to pick it up....let her ask you or pick it up herself....etc etc!!!
