My ex took our two children to a swimming class The five year old wouldn't get changed so he took the three year old into the pool and left the five year old by the door to the changing room, pool side. Five year old went into the changing room, told me they were running around in there for the duration of the half hour lesson, out of sight of the pool and their dad. I am beyond shocked and surely not unreasonable to be very concerned about future contact? He's previously built up contact from a contact center to one overnight a week.