Two years ago my son's partner lost custody of the two children to my son,,(not going into it here) but shortly after he met a new partner who already has a daughter..net had another child very shortly after, they do not live together but maintain a relationship whilst living apart, my son is coming on holiday with myself and husband and his two children, however I have just had message from him to ask if I can have the kids for two weeks while he has a family holiday with his partnered d United and the new baby. I was distraught That he would leave his children behind to have a family holiday with his new partner her daughter and new baby he however can't see anything wrong after all he said they are having a holiday with us and him so why cant he have a holiday without them ? I pointed out just because they have a holiday with grandparents that shouldn't preclude them having a holiday as a family unit step mum step sister and half brother he doesn't get why I m so upset ..am I making too much of it.. My heart breaks at him leaving his kids behind to basically have a Holiday with a new family any thoughts???