Jon Dropped the Stone ... Again

Jon started to walk away from the Farber house, shoving his hands in his pockets. But then he suddenly stopped, realizing that the stone wasn't in his pocket. He must have accidentally dropped it ... inside the house. "What is it with me and dropping the stone?" Jon asked aloud, realizing how stupid he was for making the same mistake twice. ------ Meanwhile, in the Farber house, a hand reached down for the stone, which was sitting on the floor. "Where did *this* come from?" But who was reaching for the stone? Was it Mrs. Farber or Mike "Moose" Matthews?