It's not about the wellingtons, it's about the perceived difference in values. I thought it was interesting that the DIL was thought of as joining 'our' family, but of course the DS has also joined 'their' family. I have faced similar problems over the years in my own family and have resolved this by reminding myself (many times over) of exactly what is my role and responsibility as a grandparent. I have come to the conclusion that this consists of helping out the parents whenever I can - babysitting and the like - and continuing to give my DGS the message that I love him dearly and think he is a great little chap. It is not part of my role to educate or re-educate the parents. For example, my DS and DIL are terribly houseproud, so that all toys must stay in my DGS's room and a mess must not be made. I am not at all bothered about those things, and of course I have a view about their attitude, which I keep strictly to myself. When at my house, my DGS realises that the 'rules' are a bit different, and of course their is no parental objection to making a mess in my house! I think you can only influence by example, quietly and in the background.