Susan Grey was the second wife of Thatcher Grey and the mother of Lexie Grey and Molly Grey-Thompson. Susan accompanied Molly to the hospital when Molly was pregnant and the baby was diagnosed with a congenital diaphragmatic hernia that was prohibiting her lung development. Addison operated to place a balloon that opened her airway and allowed her lungs to develop properly. ("The Name of the Game") When Molly had to have an emergency c-section, Susan was there in the OR with her. When the baby n