A long lost brother

A North Dakotan went to New York on a buisness trip. When the trip was
over, he took a taxi cab to get to the airport. The cab driver heard how
the intelligance of the North Dakotans lacks, so, he turned to the North
Dakotan and said "My mother had 3 kids, one was my brother, one was my
sister, who was the 3rd?" the North Dakotan had no idea. "You Idiot! The
3rd one was ME!" The North Dakotan went home to his wife and kissed her.
"Hey, honey!" said the North Dakotan. His wife responded saying "What?"
The North Dakotan said "My mother had 3 kids, one was my brother, one was
my sister, who was the 3rd one?" His wife was stumped "I don't know, Who?"
the North Dakotan responded saying "Some cab driver in New York."