I originally thought that coparenting would be fairly simple between my ex and I. But whenever there is a disagreement on how to handle behavior, or when we try to determine the source of a behavioral problem, my ex tends to blame me in all things.

My daughter and I recently came back from a trip for Thanksgiving. She was well behaved through most of the trip. When we returned and I dropped her off at her mom‘s, apparently there was some acting out happening. She blamed me and the trip for the unusual behavior.

How common is this in your experience?