Blimey - some of you have got a weird attitude towards your wives and your flying passion.
It's simple, you just need to be consistent with your behaviour when you have/haven't been flying. If you haven't flown for a week or two you need to perfect the miserable bastard approach, being grumpy and always moaning about never being able to fly.
When you do fly, you need to come home in the very best of moods, offering your wife the chance to have some time to herself, offer to take her out for dinner and look after the kids for an hour or two whilst suggesting she goes out and has some time to herself.
She will soon see a trend that she will want to exploit.
I have perfected this over 15 years of marriage and my wife positively forces me out of the door to go flying knowing what the result will be.
t's not unlike training a dog really