I don’t want to see granny

First thing to consider is your child’s age, says parent coach Val Mullally. “A three-year-old is very much in the moment — maybe he’s got a new toy he doesn’t want to leave. It’s of far more concern if it’s an older child with an established relationship with Granny.”
Your child’s reluctance could be down to any of myriads of reasons: ‘Granny makes me eat peas’; ‘I want to go to a game with my friends today’; ‘I’m afraid of her dog’; ‘She prefers my younger sister to me’.