Parents not on board with potty training

[5 Little Monkeys]

I wouldn't tell the parents about the other children as I think it's unfair to compare children. If the parents and dcp are not on the same page about potty training than sadly, it's the child that loses out.

I would explain this to the dcd and tell him that they either need to get on board or you will stop potty training at dc all together as it's unfair to the child to have two sets of rules regarding potty time as it is confusing and really getting the child nowhere. When they are ready to potty train they can let you know and you will start it at dc again.

That is what I would do.