Katharine McPhee was photographed kissing her former Smash director Michael Morris in public on Sunday, stirring buzz considering the fact that both of them are married to other people.

A picture of pair shows them displaying affection on the lips after their lunch date at I Panini Di Ambra in Hollywood, according to E! News. They were not shy to show PDA in a parking lot by holding hands and sharing several kisses.

See a photo of them kissing here.

The American Idol runner-up, 29, has been married to performer-turned-producer Nick Cokas, 49, since 2008, according to the report. Morris has been married to 44-year-old actress Mary McCormack since 2003. They are parents to 9-year-old Margaret, 6-year-old Rose and 2-year-old Lillian.

McPhee reportedly did not appear to be wearing her wedding ring during the outing with Morris. Reps for both stars did not respond to request for comment when contacted by E! News. However, Life & Style reported Tuesday that McPhee and Cokas have decided to end their relationship.

"They've been separated for six months," a friend told the magazine. "Nick continues to co-manage her music."

McPhee said earlier in the year that Cokas put starting a family on hold.

"I once thought that by now I'd have lots of children, but actually I'm really enjoying being able to go from point A to point B and the only worry I have is have my dogs been walked," she said. "I'm selfish right now, but that's how and where I should be. The thing is, work is the thing I love the most."

McPhee and Cokas first met in 2005 when they performed in a L.A. production of The Ghost and Mrs. Muir. They got engaged two years later and married in Beverly Hills on Feb. 2, 2008.