"The Maid" joke

A man phones his home number from work and a strange woman answers the phone.
"Who is this?" he asks.
"This is the maid," the woman answers.
"Excuse me? We don't have a maid!" replies the man.
"I was just hired this morning by the lady of the house," explains the woman.
"I see. Well, this is her husband. Is she there?" asks the man.
"Ummmm, yes," says the woman, "but she's upstairs in the bedroom with someone who I just assumed was her husband."
The man is furious and asks the maid, "How would you like to make $50,000?"
"Sure, but what do I have to do?" she asks.
"Get the gun from my desk in the den and shoot the bitch and the jerk she's with," he says.
The maid puts the phone down. The man then hears footsteps, followed by a couple of shots.
The maid returns to the phone and asks, "Ok, now what do I do with the bodies?"
"Just throw them in the damn pool," he tells her.
"Pool??? There isn't a pool here," says the maid.
"Ummmm... isn't this 555-4821?" asks the man.