If we try to frame this without gender:

Assume high paying job = higher level of stress, long hours and specialized tasks/vocabulary

Partner in that role feels the relationship is stressed because they don't spend enough time together, no time to unwind/relieve stress and seeks feedback from others who are in the same situation because they have similar stresses, face similar task challenges and speak the same vocabulary.

Does this not describe the world as it is. If we add in gender, Think about the stereotypical male executive, stressed marriage, long hours, goes golfing on weekend and talks about work with golf buddies or stay at home mom, hangs out with other stay at home moms and talk about parenting issues. Is there really a surprise that females face the same challenges, I am assuming that this is just an eyeball catching headline, but it probably should read "Breadwinners pay a cost for career success - marital stress"

Time to go find the source article.