Obviously it was not a new email account as the email address was the one that the email was sent to and had been being used by her.
The new email password was needed because the "old" password would be known by the previous owner ie you and as the whole idea of the procedure is to transfer "ownership" of the email account it requires the password to be changed to keep the account secure for the "new" owner.
You should check in your MyBT > Your Products > Email Manage, and look for the email account to see if it is now showing in the section for friends and family of if it is still showing as one of your email accounts.
As the procedure was not completed it may just revert back to being "owned" by you. If that does not happen as I have said, you need to contact BT to get them to sort it out.
