Credit: National Photo Group

Sounds like a plotline plucked right out of Smash! Katharine McPhee was spotted kissing and making out with Michael Morris, her director on defunct NBC musical drama Smash, as attested in surprising new photos  taken in L.A. over the weekend. The rub? Both McPhee and Morris are married to other people. McPhee, 29, wed producer Nick Cokas, 47, back in 2007. Morris and In Plain Sight actress Mary McCormack have been married for a decade and share three young daughters together.

Reps for all parties involved have yet to comment on the photos.

Smash was canceled earlier this year after two seasons. McPhee spoke to Lucky magazine back in January, and admitted she wasn't yet ready to start a family with her husband.

"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," the American Idol runner-up 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."