My ex and I have been sharing our children's time equally ever since we broke up five years ago. We have a daughter, 14, and a son, 11. We have both remarried and both of us have a healthy relationship with our ex's new partner. However, my daughter has been very moody lately and just recently confided that she doesn't want to go back and forth every few days as we have always done. I have had two other children with whom she is very close, and she misses them when she's at her dad's. My son, however, wants to keep the schedule the same. Should we split up the kids? What's good ex-etiquette?