I don't know if you are running Windowsm10 or 11. Go to Settings, Accounts, Family and other users. Add your wife's Microsoft account as OTHER USER not family. Give the account administrative privileges. See Create and Manage User Accounts and Privileges in Windows 10 (groovypost.com)
Windows 10
Windows 11
don't remove the SP7 from your account until a few days after you are sure everything is working the way you want.