Katharine McPhee and Michael Morris
11/14/2013 at 07:20 AM EST
It's been a rough fall for Katharine McPhee
On Oct. 22, the former American Idol
finalist was caught in a lip-lock
with Michael Morris, who directed her
in the now-canceled NBC musical series Smash
– even though both were married to other people.
Now, a McPhee source tells PEOPLE, "Katharine is no longer seeing Michael – at least for now."
In fact, the actress' marriage to Nick Cokas, her husband since 2009
, is still in a state of limbo. Despite the fact that McPhee, 29, and Cokas have been separated for months, "Katharine still has no plans to move forward with divorce at the moment, though they are not living together," adds the source.
Meanwhile Morris's wife
, former In Plain Sight
star Mary McCormack, prefers to keep her focus on her daughters
– Lillian, 2, Rose, 6½, and Margaret, 9.
"Mary is a strong woman," a second source tells PEOPLE. "Her dedication to her children will remain her focus and gift.”
Amid all the uncertainty, one thing is true, says the McPhee source: "This is an incredibly hard time for Katharine."
Reporting by ELIZABETH LEONARD