Isolation of the caretaker role is a real danger. That way lies sadness.
I'm honestly not jealous of my wife at all - when she succeeds I'm psyched. It never occurred to me to feel threatened by her success. But the one thing I am jealous of is the number of awesome, interesting, artistic, productive, and cool people she gets to hang out with all day.
For me, reading has to be pleasurable. Otherwise, I'm ditching the book and turning on Netflix. There's way too much good TV right now to write dull.