 Carla isn t hiding her secret very well: she s pregnant once again. Even though she is showing, she hasn t mentioned her pregnancy to anyone in the bar, nor has anyone in the bar approached her on the subject. Finally she announces that she is pregnant, only delaying the announcement because she wanted to tell the father first. To everyone s surprise, Carla announces that the father is M.I.T. computer geek Marshall Lipton. After talking to Marshall, Diane figures out that Marshall isn t really the father, nor does he know that he isn t. Diane confronts Carla with her deduction, and Carla admits that indeed Marshall is not the father, but rather it is her ex-husband Nick. Carla was feeling alone in the world and wanted someone stable to support her new baby. Diane guilts Carla in admitting the truth to Marshall, after which he walks out of the situation. Alone once again, Carla is dejected about her lot in life until the bar adopts new baby Tortelli as their own.