Jon Gosselin: Pot and Infidelity?

New details are emerging about Jon Gosselin’s alleged fling with schoolteacher Deanna Hummel, and boy are they doozies.

Us Magazine reports that the Jon & Kate Plus 8 dad was doing some hard partying with Hummel and a youthful gang of revelers in Park City, Utah, on May 25 and, despite the fact that it was his wife Kate Gosselin’s 34th birthday, he neglected to buy a present for his spouse.

As reported earlier, Gosselin and Hummel were spotted getting cozy at Park City’s Spring Gruv festival at the Canyons Ski Resort, where Gosselin  was promoting his charitable work with handicapped children.

However, when the cameras stopped rolling, a very different Jon Gosselin emerged.

A source reports that, though he was aware that it was his wife’s birthday, he neglected to buy a present for her.

“Hey, it’s Kate’s birthday,” a local pal recalls Gosselin telling him. “I should get her something.” But despite the fact that Jon dropped by a jewelry store, he didn’t bother picking anything up for his spouse, opting to soak up suds with Hummel instead.

And according to witnesses, brewskis weren’t the only intoxicants that Gosselin and his party crew were indulging in. As the night wore on and Gosselin and Hummel engaged in a “snuggle-o-matic” session, a source says that Gosselin and his party  began “reeking of pot…I know that the kids [Gosselin is] hanging out with like a little herbal substance.”

No wonder the guy seems to have problems with self-motivation.

Have your say in the comments section: Is Jon and Kate Gosselin’s marriage pretty much doomed at this point?