DH is not comfortable with his mother and siblings having no relationship with him (their choice) but then contacting our teenage children (11, 15 and 17) on their mobiles. One of our DCs has asked them why they don’t want to see us at Christmas and they’ve implied it’s not their choice - it is.
Background is that they have stopped talking to DH for two years following a fall out about inheritance. In a nutshell, he wanted them to plan for forthcoming IHT and they didn’t want to, so they’ve stopped talking to him completely rather than discuss and solve it.
Would you leave them to contact DC? Inevitably this will lead to some sort of unfair involvement or mental load on DC who I think should be shielded from all of this completely.