If your current binocular works for you, I would suggest buying a glass for your wife and spending any additional money on equipment, clothing and other gear that might make the hunt more enjoyable for both of you.
Exactly what I was thinking, wanted some input from people who have been there and done it.
One trip we made had the whole family, my wife and three sons, going. I had two of my own so bought each of my sons Leupold Yosemite's that I gave $65 for (2012). They were fine.
The Leupold Yosemite was just the one I was thinking about, small enough to be comfy and good enough that will eventually be helpful for me too and when my kids start hunting.