Not via the album browser.
I can offer a kludge…
Go to tracks browser and filter on the folder name. See this KB article for how to do that.
Now select all the tracks and add to a new tag.
Back in the album browser you can filter on this tag and only those albums in that path will show up. Bookmark this so you can easily come back to it from anywhere in Roon.
You will have to repeat this exercise every time you add more music to your wife’s folder.
Sorry, best I can do.