In a recent interview with People, John explained that they had been hesitant to reveal Chrissy's pregnancy in the video, because she was so early on in her pregnancy when they shot it.
"She was kind of hedging her bets, because we were early in our pregnancy," he said. "We hadn't taken all the tests to make sure everything is OK, and she said, 'Let's just shoot it,' and by the time the video would be edited, we could decide whether or not to use that scene."