How You Know You're Having a Baby...According to a five year old

While I was waiting with my student to be picked up yesterday he looked up at me and said,

"Do you have a daughter?"

"No...I have a kitty cat that's a girl, she's sort of like my daughter."

"NO! That's a cat. That doesn't count. Do you have a son?"

"No."

"Well someday when your stomach looks like mine, you'll know you're going to have one.