As above. Is it actually email you're trying to get to. i.e. Are you trying to read your emails in a web browser. Like Gmail. Or an email client, like Outlook or Thunderbird?
Or are you entering your email address as a username to log into your computer. What happens when you try to type your own email address into whatever it is? Or is it logged into something - using your wife's address- that you need to log out of first?