I didn't hear or see John Mason this am, but his demeanour all along has been a little weird. He must have known something was up, and the family had their fears on that score, too. Otherwise, her father would never have said "Oh, we're praying it's just a case of cold feet". No parent in his right mind would say that on national tv in front of God and all the people unless he suspected full well that might be the case.
It appears daddy knows his (crazy) little girl.