Poor old Man!

Last night I went out for dinner with Tom and his kids, Kat & Tommy. At the restaurant, the waitress looked at Kat and I and said "Oh, you two look so much alike, you're related, aren't you?.. Are you sisters, or mother and daughter?" I told her we were sisters. When she walked away, we all had a good laugh. Then we turned to Tom and said, "so, Dad..."