Dc's (11 and 13) see there dad once a week on a Sunday for 5 hours. Their dad has a new partner, she doesn't drive so at the weekends she expects him to drive her around shopping etc.. so my dc's have to go along, they hate shopping so their dad buys them a McDonald's or fish and chips to shut them up (make the day more fun). Dc is starting to pile on the weight so I have cut out some of the rubbish from their diets, it's not easy as dc1 has a very limited diet. Their dad also takes them to buy sweets (big share bags of sweets). He never cooks for them unless it's a pizza he chucks in the oven, he just feeds them rubbish all day. Last Sunday they came home with doughnuts, sweets and they had been for a McDonald's.
I have sent him a message asking if he could cook them something tomorrow or provide them with something healthier than McDonald's. AIBU?