Report: Jon Gosselin Spent Wife Kate's Birthday Partying With Alleged Mistress

As “Jon and Kate Plus Eight” star Kate Gosselin spent her 34th birthday with her kids, her husband Jon reportedly spent the day partying thousands of miles away with another woman.

According to Us magazine, as Kate celebrated last March with her kids at the Ace of Cakes’ kitchen, Jon was photographed on a booze and drug-filled trip to Park City, Utah with 23-year-old Deanna Hummel, the local school-teacher alleged to be his mistress.

PHOTOS: Click here to see photos of the Gosselin family.

While Jon reportedly told a friend he should get his wife “something” for her birthday, he failed to follow through on the thought. Instead, he is said to have spent the day getting drunk with Hummel at the Spring Gruv festival.

“I have eight kids, two dogs and live in Pennsylvania and I can still hang here with 15-year-olds,” he reportedly told a local paper, before sources spied him snuggling up to his alleged new gal-pal.

RELATED: Click here for the full report from Us magazine.