DSis and her partner are splitting up, and it's pretty awful at the moment. There's no one else involved romantically for either of them (certainly not for DSis, and I'm pretty sure not for him), but it's extremely acrimonious. He has disappeared, but DSis is getting pretty horrendous text/e-mail messages from him. They have 2 DC (3 and 6), who are with DSis. Ex-partner is currently saying that he never wants to see any of them (DC and my DSis) ever again, because it will hurt him too much. DSis is trying to put her feelings about his behaviour aside and encourage contact him to see the DC because they are obviously confused and want to see him. I suspect that over time ex-partner will relent and will want to see them, but who knows when (if at all). They haven't seen much of him for weeks, and nothing for over a week.
My question is: does anyone have experience of what to tell children in this situation? DSis is obviously extremely upset, and has no idea what to tell them.
Thank you in advance.