I'm looking for a fic in which the Hudsons are at the Hummels having supper, and before Kurt or Burt can answer the phone, Carole picks up. To her surprise, someone threatens Kurt, before hanging up. Without much thought, she redials the number, only to give the caller a piece of her mind, and how dare they say such things about 'her son'.
Thanks in advance, -Tikaya
EDIT: It's been found! Link is in the comments.