"There wasn't any making out or handholding," says the onlooker. "But there was that whole girly-smiley-chatty thing. She didn't seem like somebody he'd just met. It seemed like two people having a great afternoon."
Later, the two went to a bar downstairs, where "they were curled up in one of the booth seats and very cuddly," the witness tells Us. "Nobody was put off or surprised by it at all."
At the bar, the witness said, Jon "just looked different. He was so smashed, his eyes were barely open."
"I didn't recognize him at first," the witness continues. "He didn't look like himself. I said, 'Get together, let's take a picture!' But he said, 'I can't. No, really, I can't. It's contractual -- I can't have any photos.' He kept going on about it. She was like, 'It's because he's in that show.'"
Where was Kate while Jon and Deanna partied?
As documented on this past week's episode, she was at their 24-acre estate in Wernersville, Pa., celebrating her 34th birthday with the kids.