Just be careful.
I took my two boys up in a helicopter about six years ago and, you know, it just didn't feel right. I know we do it in cars all the time, but taking the kids up felt really funny.
I flew my wife into Las Vegas in a very smart Piper Seminole two years ago and although she was bowled over by the spectacle, she really did not feel comfortable 'in a little plane'.
Basically if the Mrs doesn't like it (or doesn't want to do it), I wouldn't push it. It has to be her decision to go, not yours.
Sorry to be negative but it just isn't something you can force people to do. There is also the point about all your eggs being in one basket. Think about it. I have just read the accident report from the C182 that crashed at St Mawgan in the summer. Dad, mum and the kids on board - dad badly bunrned and subsequently died......... Makes you think.
I say all of this mainly because of your limited experience. I flew my kids after a couple of thousand flying hours and it still felt funny.
Make up your own mind - you're a big boy - but for God's sake be careful.