A Jewish town had a shortage of men for wedding purposes, so they had to import men from other towns. One day a groom-to-be arrived on a train, and two mother-in-laws-to-be were waiting for him, each claiming ownership on him.
A rabbi was called to solve the problem. After a few minutes of thought, he said: "If this is the situation, you both want the groom, we'll cut him in half and give each one of you half of him."
To this replied one woman: "If that's the case, give him to the other woman."
The rabbi said: "Do that. The one willing to cut him in half, is the real mother-in-law!"