Has your wife ever been flying with you? Does she travel in the car with you? Does she worry about you going flying on your own?
(1) Yes, before we had any children.
(2) Yes, but you've got a fair chance of being able to stop a car if you're suddenly ill I suppose.
(3) Not much. But she won't have the two of us in the same light aircraft, whoever's flying, if the children are on the ground. (Except once in Sydney.)