Presumably related: husbands earn more than their wives at a much greater rate than what would be caused just by the usual gender imbalance in wages.
I should note that nobody knows why women are more likely to divorce after a big success. Some of it could be, "now that I'm the Senator/Oscar winner/boss, the first thing I'm going to do is ditch my obnoxious husband." But people generally assume that male resentment is that the root. This seems likely to me, although I freely confess that other people's marriages are an utter mystery to me, so I would certainly not be dogmatic.
Interesting comment from Indra Nooyi, long-married chief executive of Pepsi:
From my perspective, my mom says, 'Leave the crown in the garage.' I don’t think I could have balanced all of this had I brought my crown into the house every day. And would I have liked to have brought it in? No, not at the expense of my marriage and my children.