updated 10/13/2010 AT 2:00 PM ET
•originally published 10/13/2010 AT 3:00 PM ET
“She knows who David is and what he’s like,” a source close to the couple tells PEOPLE. “She married him. All that he said, and how he said it, that’s David.”
“Does she wish she could edit what comes out of his mouth? Sure,” the source continues. “But nothing surprises her at this point. What’s amazing about Courteney is that she doesn’t get caught up in all the ridiculousness.”
On Tuesday, after news of their separation broke, Arquette, 39, chatted with Stern about his 11 year marriage to Cox, 46, denied rumors that he cheated on her and said that she stopped having sex with him months ago.