So let me get this straight... The main reason she's going for the divorce it's because the husband has a female family member that he's close to AND look well together as a couple. So, she's going for the divorce not only because she thinks that he'll be better with her cousin that with her, but also because the other members of the household (the service staff, that has absolutely no voice in this matter) think likewise but are way more militant against any disturbances of their, let's say One True Pairing of the master and his cousin. The cherry on top it's that all of this happens regardless of both the husband's and the cousin's opinions, will, preferences and even outright orders. Did I got it right?
...my, does this sound EXTREMELY familiar. Let it be a lesson.