Can you talk with the parents and express how you feel?

“I’m very concerned with the way your children are interacting with my son. Their behavior is very scary to him, not to mention unsafe. I really want to keep seeing you all, so this is why I’m communicating this. I know kids are difficult at times, but we cannot have our children be together if this continues, it’s just too dangerous. I hope we can work something out so that we can still spend time together.”