I'm a US Citizen.
After doing some digging, it looks like the best way to handle it is to report the income on Line 11 of Schedule C as Contract Labor. And then have my wife fill out form W-8BEN. Still need to do some more reading but that seems the best way to handle the situation based on the link below and some others that I found.
https://www.letsdeel.com/blog/all-you-need-to-know-when-hiring-independent-contractors-2020
