I wrote on here a few weeks ago about how my brother wants nothing to do with his child's family. Long story short his ex ran off with another man when she was 24 weeks pregnant. The child will be 4 in January and is openly calling his Mummy's boyfriend 'Daddy'. My brother is absolutely gutted by this. He says everytime he drops off the child to his mother the child asks his Mummy where 'Daddy' is? His Mother makes no attempt to correct him and just shrugs it off saying its difficult to explain to the child that this other man is not his Father. Is she being unreasonable here?