I am in the final bit of pregnancy with DC2. DH's ex seems to be ramping up hostilities in the run up to the birth in a way that is really not helpful. The two children are early/mid teens and their mum has never helped with travel though they live a good few hours away each way (i.e. refuses to take the kids to the local station to put them on a train, or encourage them to go themselves). DH has said he'll pay for train tickets for the kids to visit, but that he can't do his usual driving thing in the weeks of my due date, and she is reframing this as that he can't be bothered to see them and doesn't care about them because of the new baby. Also there's a few other things -- she's obviously been telling the kids of various grudges she has as the oldest one called to have a go at DH in quite an out of character way. She did this a bit with our first baby but you would think that years later, and with the kids so old, she wouldn't do it again.
The detail isn't important because if it wasn't this it would be something else, but has anyone else experienced an ex pulling her own kids back and making it hard for them to engage with birth of DC2?
Also, how old do you think DSC are before it's their responsibility to maintain the relationship with their NRP? My DSC are in thrall to their mother and she is very bitter and manipulative, but when will they be old enough to break away or take responsibility for how cold they are to their dad? I would have thought they would be babysitting etc. but their mother seems to completely control their relationship with our household. We are usually close and I have known them for 7 years. Any advice welcome.