At this point, we don't know too much about Madison that is fact, other than her career, kids, and that her husband died 6 years ago. However, there are definite clues that Nick's addiction is nothing new to her and in her words it's in his blood, leading us to speculate as to whether she was talking about her deceased husband or herself. While I'm inclined to think it is was Nick's dad who was the drug addict, I am starting to wonder about Madison. In episode 3 we see her pouring herself a drink while waiting for Travis, and then she's obviously drinking to deal with things as she stares at Susan and talks to Liza. Is it possible she's an alcoholic and was referring less to Nick's drug habit and more to him having an addictive personality?