. >> reporter: and one other key insight -- one of suzy's doctors, claudia reardon, explained that whenants, it can compound the symptoms. >> you give them an antidepressant and it lifts their mood. but they don't have as much of a ceiling on their mood and so it can push their mood too high. we often see symptoms such as hypersexuality, spending lots of money, engaging in lots of reckless kinds of behaviors because people generally aren't in the state of mind to think through ahead to the consequences of those kinds of behaviors. >> i would never have become an escort if i wasn't on the drug that made me hypersexual. but i also know that i was having sex for money. so i'm not pinning it on bipolar and looking at that as the excuse. >> reporter: it's taken years of therapy, medication, and determination for suzy to control her mental illness and confront the horror of her past. >> i take full responsibility for what i did. >> reporter: just getting through our shoot in las vegas, a place she calls one of her primary triggers, is an accomplishment in itself. >> so kelly doesn't exist any