Is their really anything wrong with her not being interested in something you do?
I don't mean to be smart, but why should she be interested in aviation simply because you are?
If she comes home and wants to tell you about the great new shoes that she boughts and wants to tell you all about them do you show great interest? Maybe you'll be polite and show some interest for a few minutes. How about when she's still talking about them an hour later and about the ones that she was going to buy instead of these ones?
Then how about when this becomes a weekly event? How long before you start to try and polietly show her that you really aren't interested and that she should talk to her 'girl friends' about this sort of stuff?
You can subsitute shoes for pretty much anything else that girls found more exciting than men, or that another man finds more exciting than you.
I don't think that it's really any harm that she doesn't find aviation interesting.
Someone else described here what they do with their wife that has no interest in flying, and I thought it a lovely way to handle the situation. Whenever they go flying, they make sure to arrive home in exceptionally good humour, bringing a bunch of flowers for her (or chocolates whatever) and then makes her dinner, and all in all makes her feel special for the rest of the day. It didn't take long before he wife was suggesting that he should go flying this weekend, and she could easily see the benefits to her
What a good way of handling things
dp