Pörsänmäen murha

A guyin Pörsönmäki dials his home and a strange woman answers.
The guy says, "Who is this?"
"This is the maid," answers the woman.
"We don't have a maid," says the man.
The woman says, "I was hired this morning by the lady of the house."
The man says, "Well, this is her husband. Is she there?"
The woman replies, "She is upstairs in the bed room with someone who I figured was her husband."
The guy is fuming and says to the maid, "Listen, would you like to make $50,000?"
The maid says, "What will I have to do?"
The man tells her, "I want you to get my gun from the desk, and shoot the witch and the jerk she's with."
The maid puts the phone down; the man hears footsteps and then two gun shots.
The maid comes back to the phone, "What do I do with the bodies?"
The man says, "Throw them in the swimming pool."
Puzzled, the maid answers, "But you don't have a pool."
A long pause and the man says, "Is this 567-5309?"