'Jon & Kate Plus 8' dad's 'gross' affair confirmed by woman's brother

Jongosselin_290 Jon Gosselin of "Jon & Kate Plus 8" fame is indeed having an affair, says the older brother of the "other woman," reports Us Weekly.

Jason, the brother and roommate of Deanna Hummel says: "She's a nice girl, not a homewrecker. He is a bad liar. This isn't healthy for her. But she is refusing to help herself, so here I am trying to help her myself. I hope this clears the air."

He adds that the affair has been going on for three months and that when Gosselin, 32, would come over to the house, "A lot of the time, it was pretty, um, gross listening to her, you know, um -- how do I say this? The walls are thin. Let's just say that. I mean, no one wants to hear his sister having sex, let alone with a married dude who's, like, almost twice her age and who has eight kids and a maybe-crazy wife. Ick. Nast."

Ick? Nast? Who is this guy? One of the "Gossip Girl" teens?

Hummel recently corroborated the claim that she and Gosselin were just friends who got caught by a photog after a night of partying. That's all.

For more of the sordid details of the alleged affair, check out Us Weekly.

Do you believe the rumors? Would a brother sell out his sister this way? What does Kate have to say in all this? Should the Gosselins get a divorce?

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The 'Other Woman' stories:

'Jon & Kate Plus 8's' Jon Gosselin admits to 'poor judgment,' not cheating
'Jon & Kate Plus 8's' Jon Gosselin seen with mystery woman
Jon Gosselin is a faithful husband and good dad, say friends
'Jon & Kate Plus 8's' mystery woman speaks up"

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