The only bad part is she will still be so young when he passes on.
That's very true. My sister is 51, and my brother in law is 66. He is retired, she is still working and will be for another 14 years. He is starting to feel some aches and pains and age-related problems, she is still in great health. They have been married for 24 years, but it is getting more difficult for them as they age. My sister is realizing the age difference more and more.

And, Popcornbird, for what it's worth - I agree with you: it may have some historical precident, but it's still yucky!!