"hiring a civilian", "you don't have to follow him into the mundane world"
What the heck does he think he is? A noble, a royal? Flash news you're also a civilian albeit a filthy rich one. We used to call them the bourgeoisie.
Also are japanese CEOs so busy that they can't spend time with family? Most wealthy Westerners or CEOs spend only a few hours a week and spend most of their time playing around.
It's very dumb, if she's exerting herself so much that she has periodic collapses, they may not even get an heir and the family assets will be absorbed by her future husband or acquired by investors.