Bed Time

A boy arrives home from a party at his friends house about a hundred meters away from his home. The Mum hears the front door open and says, "welcome home honey",from the living room to her son. "Straight to bed, remember to brush your teeth", "okay", says a squeaky voice coming from the hallway of the house. The boy scampered upstairs, brushes his teeth, and tucks himself into bed. He shouts in a polite way for his Mum to give him a goodnight kiss before he goes to bed, Okay just coming, the Mum yells. Half a minute later the boys Mum runs up the stairs of the house and enters the boys bedroom and shuts the door behind her, just then the house door opens,a voice from her son downstairs says, "sorry I'm late Mum", This mum only has one child. A soft laughter is heard from the child's...... bed.