This is unkind of me. But when I heard that I did wonder if Jen M. was stirring the pot a bit by mentioning an ex-girlfriend of John's when she presumably knew that Karen was listening...AND I listened and watched super hard and nothing. PLEASE ask what happened after she texted him that at 2:00 when they resume, immediately. My eyes popped out when JMc mentioned that JO had briefly dated 'Bella's mother, when she was giving description/landmark to the Alberts house. Bella is a close friend of JO's niece.
Edit - It seems @shotgun09 was thinking along the same lines. Definitely a mean girls tactic.