Credit: Jeffrey Mayer/WireImage

If only Smash had been this consistently riveting onscreen. Katharine McPhee and her series director Michael Morris stole some of the spotlight away from Kim Kardashian's engagement and Prince George's christening this week when the pair were photographed making out in broad daylight in an L.A. parking lot -- in spite of their marriages to other people.

And, while Morris' actress wife of ten years Mary McCormack allegedly kicked him out of their home after finding out the news, McPhee's situation is a little different. As rumored, the actress and American Idol runner-up, 29, has been separated from producer husband Nick Cokas for at least six months, multiple sources confirm to Us Weekly.

Indeed, since she and husband of five year Cokas, 47, parted ways, McPhee "has had friends living with her for months," one insider says.

"She is SO embarrassed she was caught," a second source says of the undeniable photos. "She should have known better!"

In Plain Sight star McCormack and Morris share three kids together and reportedly split their time between L.A. and New Mexico. The actress, 45, "is so cool and the nicest person," the second insider adds. "It's so sad that this happened to her. She's truly great."