. 1 / 2

It was a sad, lonely birthday for reality TV mom Kate Gosselin. That's because her husband Jon was not in attendance.

Of course, Kate didn't spend her special day all alone. She was accompanied by her eight children, a camera crew, and that fabulous hairstyle, as she baked for the occasion at Charm City Cakes.

Still, John absence was "a little depressing, I guess," Kate admitted to E! Online.

Sort of like every bit of news related to the Jon and Kate saga?

The plot gets thicker still, with US Weekly reporting that -- while Kate was celebrating -- Jon was in Utah with 23-year-old teacher Deanna Hummel, with whom he allegedly had a 3-month affair. Jon maintains that he was just in Utah to see friends and that the solo vacation just "happened to fall on Kate's birthday."

The latest season of the couple's reality show , "Jon & Kate Plus 8" has been panned by critics, as the focus has turned away from child-rearing and more towards the couple's deteriorating marriage.

More on MSN:

Photos: Jon and Kate Gosselin

The great "Jon & Kate" debate