My 15-year-old son goes back and forth between his father’s home and mine. When he’s ready to return, I always go to the supermarket and stock up. Yesterday I was talking to his bonus mum (my co-parent’s wife) and she mentioned his favourite food at their house. I was shocked. He never eats burritos at our house, and I told her so. I told her about his favourite food at my house – French fries from the air fryer – and she laughed. They don’t have an air fryer and he never eats French fries there. I’m so afraid there is something psychologically wrong here and we have tried so hard to make it easy on him. What’s good ex-etiquette?