Welcome, I am Cory. Thank you for asking your question today.
If you want to create a new email account, please follow the instructions below:
1. Sign out of your account, if you are logged in. (You can sign out by clicking the name next to the picture at the top right.)
2. Once you sign out, please click https://login.yahoo.com/account/create to create the email account for your wife.
Please let me know if I have answered the question you had today.
Let me know if you have any other questions about this.