The two also talked about their three daughters—Gracie, 19, Maggie, 18, and Audrey, 15—and how protective they are of them. 

"There was a winter formal or something, there was a bunch of kids in a limousine and I had a sledgehammer over my shoulder. But that was on purpose," McGraw said. "You don't want to be mean, but when somebody's taking your daughter somewhere, you want to induce a healthy amount of respect—and fear!"

"I agree with that," Hill said. "I was a little soft on it but then after you go through it for the first time, for those of you who have daughters out there, all of a sudden I became this animal, like, 'Do it. Take the sledgehammer...whatever you have to do, do it.'"

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