Forgot Password of Apple ID with icloud.com
My wife's Iphone 5C has Apple ID to be mywifefullname@icloud.com. I did not know how her sister helped her to set up this Apple ID with icloud.com
Now my wife forgot the password of Apple ID. I went to Apple link to reset the password.
The problem is that I did not know how to access to mywifefullname@icloud.com to retrieve the email resetting the password for Apple ID
Any your instruction would be appreciated.
iPhone 5c, iOS 8