Jon & Kate Plus 8 star Jon Gosselin has been allegedly having an affair with a third grade teacher, Deanna Hummel. According to Hummel's brother Jason, the reality TV star and his sister met in January and began seeing each other shortly after.

On Tuesday Hummel told Us Weekly magazine that the couple would hang out together and act like "two teenagers"; adding, "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."


Gosselin and his rumored mistress addressed the allegations though, with Gosselin telling People magazine that he needs to adjust more to being in the public eye and "be more careful and aware" of who he associates himself with. He tells the magazine that he did not cheat on his wife and that he is "sorry for putting my family in this awkward position, given some poor decisions and bad judgments" he recently made.

Hummel also released a statement, saying that her brother "is making this all up" and has no credibility. She claims he's getting back at her for kicking him out of her home.

In a recent Starpulse story, Gosselin answered to more rumors of alleged cheating, after being seen partying with a group of college coeds at a bar.

Reality show "Jon & Kate Plus 8" airs on TLC and follows the daily lives of Jon & Kate Gosselin and their eight children.

What do you think? Did Jon cheat on Kate? Will they last? Vote in the poll and post your comments below!