DH is getting pretty down about this situation and I'm struggling to figure out what can make it better.
In a nutshell, he and his siblings have never got on that well. He's always felt a bit on a limb - he's the eldest and there's quite a big age gap with the youngest. Growing up it seemed like everything was geared towards his youngest sibling. Then both younger siblings ended up living at home until around their 30s (whilst DH moved out at 18 for university and then we lived together), and seemed to become very territorial over it and their relationship with their parents.
He used to just lump it, but things have come to a bit of a head now that we've recently had a baby. DH's siblings now expect to see the baby on a regular basis (i.e. every weekend) even though they have no relationship with him, to speak of. If DH tries to arrange anything with just his parents, they ensure the siblings are also there, or sulk. It's now reached the point where he doesn't really have a relationship with his parents either now, as all that seems to matter to them is not upsetting the others.
DH has tried to explain to his parents that he wants some one-on-one time with them but his DM says he's being unkind to his siblings.
All a bit baffling to me as my parents (as much as I love them) were always much more hands off with us as children! Very hard to see DH so down about it. Where do we go next?