Revealing mistake: When Sandler is talking to the kid, they are passing through the Greenwich Village area. In the next shot, they are walking in front of a "clock building" (one side has the numbers 1-12 and 0-59). This building is located on John Street in the financial district, which is over 2 miles away.
Sonny: Congratulations! You and "Big Boobs" McGee are gonna get along just fine.
Kevin: Don't call her "Big Boobs" McGee.
Sonny: You're going to explain to your kids that you met their mother while she was waitressing at Hooters?
Kevin: Sonny that was five years ago! She's a doctor now, and my fiance. So from now on, Dr. "Big Boobs" McGee.