One day, my wife mentioned something she posted on FB. I remarked that I hadn't seen anything from her in a while. I logged onto FB to discover than not only was I no longer her friend, but we had only one mutual friend, my wife. She had unfriended ALL of out mutual friends, but kept my wife (who I'm not sure she'd ever met). I assumed that she didn't unfriend my wife because she didn't remember who she was, but she commented on my wife's status recently. Bizarre.