Jon Gosselin looked like he didn't have a care in the world as he took time out from playing with the kids on June 21, Father's Day, to sign autographs for fans of Jon & Kate Plus 8 at his home in Wernersville, Pa. He joked about his dirty habit -- smoking cigarettes -- and about giving up going to clubs. "I learned my lesson," he cracked, referring to the trouble he got into recently with wife Kate after he stepped out with other women. He was blasé even when someone asked where Kate was on the special day. "I have no idea," he said with a shrug.

The reason Kate was nowhere in sight on Father's Day quickly became clear. The next day, Kate decided to end the couple's 10-year marriage, filing divorce papers at the Berks County Courthouse in Reading, Pa.

For more on the couple's split, and why Kate feels she has to protect her children, pick up the latest issue of Life & Style Weekly, on newsstands now!

Photo Credit: Retna