My comment on Dalrock:

My impression is that when a woman says, “It is over,” there is nothing more one can do.

And his response:

This is nearly always the case. The exception that comes to mind (and proves the rule) is if the woman decides divorce would be harmful to her personally. One of the patterns my wife has commented on is she has never caused a divorcing woman to reconsider by explaining how much this will harm her children. However, if the woman becomes convinced that divorce will harm her personally, suddenly she will have a change of heart “for the children”.

But the husband is in a poor position to deliver the message that divorce will harm the woman. Another relative might be able to, as might another woman. The most effective focus is generally on the woman’s realistic dating/remarriage prospects. This is most easily framed as “You know how men are. They are too selfish to commit to an older woman/woman with children!” This, along with pointing out the real life results of the divorcées the woman knows (not the marketing job, but the details of the real replacement man).