He asked her where she was going, and she replied, "I'm going to Las Vegas."
He questioned her as to why she was going, and she told him "I just found out that I can make $400.00 a night doing what I give you for free."
He pondered that for a while, went into the house, packed his bags and returned to the porch and his wife.
She said, "And just where do you think you are going?"
He replied, "I'm going, too."
"Why?" she asked.
He said,
Spoiler:
