Once back in Harmony, Luis eventually discovers that Bob Wheeler is none other than his father, Martin Fitzgerald. Luis is furious with his father for abandoning their family and demands an explanation, but Martin refuses. Martin's reason becomes apparent at Luis and Sheridan's second, and ultimately failed, wedding ceremony in December 2004, when Ellen Wheeler is revealed to be Sheridan's late mother, Katherine Crane. Martin, seeing the abuse that Katherine had suffered as Alistair's wife, helped her to escape her abusive husband, only to realize that he would be killed if he returned to Harmony; the two then became lovers in Mexico. Sheridan is thrilled to have her mother back and wants to bond with her, but Luis objects, furious at Katherine for tearing his family apart.