Jon Gosselin tells Good Morning America anchor Chris Cuomo that he is not entirely sure his estranged wife Kate and her bodyguard, Steve Neild, haven't been having an affair behind his back.

"I speculate, but I don't know -- that's a general feel," Jon said. "You know, almost like when they were traveling together, I felt jealous. Here I'm Mr. Mom. And then there's some other guy traveling with my wife."

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