Father receives a super high phone bill, but he always makes his phone calls at work... so he asks his wife about it. She replies: ""It's not me, you know I always use the telephone on the grocery store I work at"". So he asks his son about it: ""It's not me, you know I always use the telephone at university."" Then he turns at his daughter: ""Not me either, I always use the one at school..."" Everybody turns the face to the foreign housekeeper that started last month: ""Why are you looking so angry? You guys are also using the phone at work.""