when i go to my hotmail account, under "Hotmail Highlights-Upcoming birthdays" there is a list of birthdays, apparently from my daughter's facebook account, listed. This child has had their own email account for many years, and I have no idea, how her account got linked to my hotmail account???  She uses her own e mail acct for facebook.  We have a facebook acct also, but our own acct isn't linked to hotmail? I want to remove these contacts of hers.  Our daughter does NOT use our hotmail account at all.  
Help!!
I did some research and saw under our account info that her name and facebook account are linked to hotmail, but none of us knows why?

She has never listed our hotmail acct with facebook.

We do NOT get emails or spam from these people, I just find it annoying to constantly see these names on that Hotmail overview page under "Highlights-Upcoming birthdays"