I have no kids of my own and never wanted any, but my wife's son from her first marriage lived with us from the time he was 6 until 16. I've been fortunate in my career so I was always able to support him and my flying habit. And it's probably no coincidence that I upgraded to my Acclaim about a year after he moved out.
Neither he nor his mother share the wonder I always felt about flight. In fact, they both slept through most of our flights. Kinda bummed me out, but to each their own.
My wife has no desire to learn to fly. That's fine with me because I wouldn't want her backseat driving to transfer to the cockpit! She's a bit of a scaredy-cat in the plane so I'm having a hard time convincing her to take a pinch-hitter course, which would make me feel better as the years keep piling on.