Us Weekly says he did.

Their new issue, which comes out today, says it has confirmation from "five people close to the situation" - including two relatives of the other woman that "Jon & Kate Plus"
dad Jon Gosselin, 32, has been having an affair with third grade school teacher Deanna Hummel.

Here's the alleged mistress' brother, who is also her roommate, comments:

"She's a nice girl, not a homewrecker," Jason tells Us Weekly. "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."

Tomorrow night at 9, Lifetime premieres the first in the Nora Roberts' Collection of films "Northern Lights."

You may have heard that it stars country singer LeAnn Rimes and "Ugly Betty" actor Eddie Cibrian and that US Weekly insists that they began an affair on the set. There evidence: grainy video of the two smooching at a restaurant, LeAnn carrying a copy of "For Better Or For Worse," a book with the subtitle "Divorce reconsidered," and their signature evidence, while she was carrying the book, she wasn't wearing a wedding band.

LeAnn hasn't helped herself with her non-denial denial: "not everything in our lives is always black and white." (Did she mean this?) Also-married Cibrian adamantly denied the affair. I do remember on one award show LeAnn sayng from the stage how she been married to one man and never been arrested, as evidence of how she wasn't one of those young stars that lost their minds.

Karma is a female dog, ain't it?