Jon & Kate are over: Kate Gosselin's brother

The marriage of Jon and Kate Gosselin is "over", Kate's brother Kevin Kreider and his wife Jodi say in an explosive new video interview, only on RadarOnline.com.

On the stunning video, Kevin Krieder, 32, says "Six months ago Kate came to Jon and said, 'Hey, it's over.'"

As RadarOnline.com recently reported, Jon has been having an extramarital affair with a third grade school teacher, Deanna Hummell. Kate is rumored to be cheating with her bodyguard Steve Neild.

Both Jon and Kate have denied having affairs. Kate's bodyguard and Deanna Hummell have also denied the affairs.

Kevin's wife Jodi says everyone ignored the problems in the marriage to keep the show's ratings high. She says: "The show is not reality, and has not been for a long time. This is a train wreck."

Kevin adds: "Their family is in shambles."

Jodi and Kevin gave their only print interview to Star magazine, and in a cover story this week, they say the marriage is now governed by a secret contract. They reveal details of that contract in Star's interview.

Kevin says both Jon and Kate need to give up the fame and fortune in order to save their marriage while Jodi says a divorce would affect the children terribly.

In the Star magazine interview, she explains how she believes Kate is exploiting the kids and how badly it's affecting them.

Kreider says his sister Kate wants to be a talk show host, and she really is starting to believe her own press."

Both Kevin and Jodi Krieger have appeared in past seasons of Jon and Kate Plus 8. via