Telephone bill

The phone bill was exceptionally high and the man of the house called a family meeting… On a Saturday morning… after breakfast…
Dad: People this is unacceptable. You have to limit the use of the phone. I do not use this phone, I use the one at the office.
Mum: Same here, I hardly use this home telephone as I use my work telephone.
Son: Me too, I never use the home phone. I always use my company mobile.
Maid: So – what is the problem? We all use our work telephones!!!