Ideally, it is a "win-win" that yields a productive discussion between the two of them while preserving Rock's integrity, boundaries, and overall well-being.
Again very simple. One productive phone conversation per week on Rock's time limited only to their special needs children. Positive interaction for the parents which will benefit the children in the long run.
Integrity - I put my children first Boundaries - I will only discuss the children in a positive and productive manner based on mutual respect for one another as parents. Well being - Positive interaction for the parents which will benefit the children in the long run.