how to change related hotmail parental control account email

I set up a child's account for a colleagues kid and confirmed the child's account using my own hotmail acct thinking that was all I had to do.  Now it suggest that I'm the parent/guardian of that child and I'm not sure how to change that parent account to someone else (the real parent).  Is this necessary?  I'd rather kill the account and start over than be stuck with an association to the child's account forever.