I'm looking for my mummy

Simon and Harrison spent a few days down south this week, and one night H got himself worked up about missing me, and wouldn't go to sleep. Each time Simon put him to bed, he would come out a short time later. One time he came out carrying Simon's mobile phone, and handed it to him with a very serious look on his face. Simon noticed that Alison's name was on the screen. The conversation went like this -
Simon - "Hello"
Alison - "Hi, a little boy just rang this number looking for his mummy"
Simon - "Hi, it's Simon!"
Alison - "Hi, my name's Alison. A little boy just rang this number saying he wanted his mummy"
Simon - "Alison, it's me Simon - your brother in law!"
Laughter all round....