Olivia takes Steve to the hospital. Meanwhile, the police get a lead that Heather is in Port Charles, and try to track her down. However, Heather makes her way to the hospital to steal medication for the baby. Olivia finds her in the stairwell, and when she tries to grab the baby, Heather pushes her down the stairs. Steve finds Olivia and gets her help. Meanwhile, Heather goes to the roof with the baby, where she's cornered by Jason and Sam. Steve is about to go to the roof, when Dante comes and tells him that his mother fell from the roof and is severely injured. Steve goes out to help, but Elizabeth holds him back. Eventually, Heather ends up in a coma after surgery. While Heather is in the hospital, Steve monitors her. When he comes with Olivia, she freaks out when she sees Heather standing in front of her, but Steve stops her, because it's actually Todd Manning, Heather's former employer. Todd drops off Heather's belongings to Steve, and among them, Steve finds the paternity test for Sam Morgan's child, saying that Jason is the father of her baby, not Franco, and realizes Heather switched Sam's paternity test. He drops off the results to Sam. Meanwhile, it is revealed that Steve helped Monica fake her son, A.J. Quartermaine's, death. In early 2013, Steve proposes to his girlfriend of two years Olivia, and the two become engaged. On February 14, Heather is presumed dead after being choked and thrown into the harbor.