my icloud email address is incorrect. how can I fix it

[iMore Question]

it seems my wives information is on my phone.

 

[Ledsteplin]

You must be sharing an iCloud account. You both need your own account. You can share the iTunes ID, but you need your own iCloud, iMessage and Facetime ID's. Who's email is used? If hers, you need to change your Apple ID with your own credentials.
http://m.imore.com/how-change-email-address-associated-your-apple-id

https://support.apple.com/en-us/HT202667

Hope this helps.