Cruel To Be Kind is the true story of Max, aged 6. He is fostered by Cathy while his mother is in hospital with complications from type 2 diabetes. Cruel To Be Kind is the true story of Max, aged 6. He is fostered by Cathy while his mother is in hospital with complications from type 2 diabetes. Fostering Max gets off to a bad start when his mother, Caz, complains and threatens Cathy even before Max has moved in. Cathy and her family are shocked when they first meet Max. But his social worker isn’t the only one in denial; his whole family are too.