The 46-year-old actress was joined by co-star Brian Van Holt, whom estranged husband David Arquette has said she had an “emotional affair.”
Sitting side-by-side on a dock, the on-screen former flames could be seen enjoying an animated and friendly conversation.
Brian plays Courteney’s free-spirited ex-husband on the hit ABC sitcom.
Rumours suggesting they were a real-life couple first sparked back in April when Courteney sent her limo home to spend the night on the Cougar Town set with Brian.
“The talk on the set was that she and David had an open marriage,” an on-set source was quoted as saying.
Despite their troubles, meanwhile, Courteney and David will next be seen together onscreen in Scream 4, the latest in the horror film franchise. They first met making Scream with Courteney playing a TV reporter and David and town sheriff.