Something I've noticed about moving to a new place: You'll occasionally look back on it and feel a little heartsick about having left it. You'll miss certain things about the the old place too. But after a while, those longings will fade away.
The last state I lived in before moving to Sicily was Rhode Island, a real "Blue" shithole with onerous taxes, a dictatorial, entrenched ruling class, lousy public schools, horribly business-unfriendly laws and an annoying Trustafarian class of moneyed, whacko leftists who always get their way as far as policy goes. Yeah, there are some good restaurants and some "culture" too. But I was very glad, ecstatic in fact, to permanently GTFO of there.
Experienced a serious learning curve moving to a small, hilltop town in Sicily and yes, there are times I miss the US. And I even miss some things about shitty, busted-out Rhode Island, like clamcakes, fried clams, NY System weiners and a few of the cool, live music venues. But that's about it now.
Try staying in Idaho and I'm pretty sure your wife will eventually settle in. At the very least you'll "flush out" her true intentions.
An interesting thing I’ve noticed from experience: it’s never quite the same as you remember. That’s because nostalgia colors your memory. I don’t mind visiting to enjoy the highlights but I’ll never return to live the same life I had in California.