Growing up, DP had a very poor diet where he was only given frozen food and ate a lot of crisps and sugary food. He has a 16 year old DS from a previous relationship, living with us full time and he's exactly the same. He eats tinned and frozen food for dinner mostly and eats crisps and chocolate, not really much fruit or veg. I came into his life when he was 10 so he was already used to this diet. He does eat what I make occasionally if it's something he likes for example spaghetti Bolognese.
I have a 4 year old and he is starting to refuse meals I make and would rather eat what his dad and brother are eating. They're often giving him crisps and chocolate so now he cries and cries wanting them. I don't leave DS alone with them because I know what he'll be given.
I don't have an issue with what they eat, I know it's unhealthy but they're a normal healthy weight and I can't stop them from eating what they like but I'm wondering if itd be unreasonable to ask them to not eat all that in front of DS.
I don't mind him having occasional treats but I don't want it to be all he eats. He was previously a very good eater.