Susan's mom pays an unannounced visit to Wisteria Lane after she and her boyfriend call it quits. Meanwhile, Gabrielle faces Carlos' wrath after he learns about the hospital settlement and tries to change their prenuptial agreement in order to keep Gabrielle in check while he serves his jail sentence. Lynette and Bree experience a chill in their friendship after Bree babysits Lynette's kids and dares to discipline Porter. Also, Bree and Rex visit Andrew at the teen rehab camp where they learn some shocking news about their son. Lastly, Felicia gets closer to Zach and reveals some disturbing details about his family in the past.