Five-year-old Christine, an only child, spent the day playing next
door with two girls who were sisters.
When Christine came home, she told her parents,
"I want a baby sister so bad. Please can I get one?"

Her parents looked at each other and laughed.

Mom said, "A sister would be fun."

"But if we have another baby it could be a boy," added Dad.

Christine thought a moment and said, "Never mind. It isn't worth the risk."