<P> Paul Young murdered Martha Huber after she admitted blackmailing his late wife . He tried framing Mike for the murder . Susan Meyer discovered that he had been in prison for manslaughter and drug dealing . Devastated, she ended their relationship being disappointed that Mike didn't tell her the truth . However, she visited Kendra and Noah, looking for answers . Kendra explained that Mike and Deirdre were drug addicts . Mike was defending Deirdre from an undercover policeman . Mike tried stopping the policeman and caught them together . Mike and the policeman had a fight and they went over a balcony . Mike survived but the cop didn't . </P> <P> Mike also discovered that Paul Young was involved in Deirdre's murder . He took Paul hostage and planned to shoot him until Paul told him that he and his late wife lived in Salt Lake City years ago . Mary Alice worked at a rehab centre and met Deirdre . One night, wanting drugs, Deirdre tried to sell her and Paul her watch--claiming the baby needed food, but Mary Alice knew Deirdre would buy drugs . She offered them her baby son, Dana . Mary Alice agreed and they moved to Fairview with the baby, now named Zach . Three years later, Deirdre found them and demanded her baby back; they refused . Deirdre went to take Zach but Mary Alice stabbed her to stop her . Mike let Paul go, realizing Zach was his son . Meanwhile, Zach held Susan hostage after finding out Mike had kidnapped Paul and intended to kill him . </P> <P> When Mike got home, he and Susan fought off Zach and he fled because Zach was keeping Susan so Mike would come home and Zach intended to kill him . Susan was stunned to discover that Zach is Mike's son . Susan was wary of Zach because his behaviour towards Julie was worrying, particularly when she asked him not to see Julie as much . She encouraged Zach to go to Utah, looking for Paul and gave him money . When Mike found out, he ended their relationship . </P> <P> Mike tried getting to know him, on his return from Utah, and Zach was initially interested . Paul, however, told Zach that he was getting tired of his obsession with two people who hadn't loved him enough to keep him . After that, Zach made it clear that he felt Paul was his father . </P>

When do susan and mike get back together