AIBU to think it's bloody difficult to enforce consistency in these situations?
My DP and I have pretty similar views on behaviour, unfortunately his ex is totally on a different page. She lets their DC get away with doing nothing, eating crap, watching tv all the time etc. Then when they come to DPs if he tries to enforce rules they get upset. At mine if I ask them to pick up toys they say I can do it for them!
She also makes them quite dependant on her, often they are crying and upset when they're dropped off because they don't want to come (which I think she probably encourages) and then every time they're asked to do anything they don't like they want to go home.
I feel for my DP, the constant can we go home / we miss our mom is pretty horrible for him to hear. He and his Ex have been split for over 2 years so it's not like this is really recent and they're just getting used to the changes.