Hey there, Revatrin ! If you haven't already, check out these directions on the Netgear website for a walkthrough on setting up your extender: How do I set up my NETGEAR WiFi range extender? As a side note, we generally suggest against using third party extenders with eero as we often see extenders cause conflict with the eero network.
You can always add additional eeros to your current eero network to extend the range. My best suggestion would be to look into adding another eero to your network to help get a better signal in your wife's office. Here's a quick link to our shop to check out eero options: eero Shop.