So, your situation that you just described would be a version of that 1% users that unwritten rule would apply to. You would essentially be giving her the 'rights' to use your photography.
So, she can post using your photography and just have a credit to you somewhere in the post, under the photo, or in the footer... that kind of thing. It's mostly just to ensure that the photos in a post aren't presented in a way where they appear to be taken by the poster as the photographer, when in fact they aren't.
Plus, there is a bit of some flexibility when it comes to husbands and wives intermingling content. Just as long as it's all transparent and done proper... there isn't anything to worry about. I also hope this answer was complete enough for you.
You Keep Rockin it too bro!
Thanks! I'll give her the news!