Because John told you not to talk to me. He's Dean and Sam's Dad, right? And because, the people who hate them are evil.

[Ruby sighs and lays back on the bed, adjusting the video as she does to keep it kid-safe still.]

Because I came from a time where everyone I knew was sick and dying. I sold my soul to a demon to live, and ended up becoming one myself. And when you're a demon, you do evil things, and I wanted purpose behind what I was doing instead of just being evil because I could. A lot of demons are like that. So I decided to help the person who made it possible for me to live at all, and I set Lucifer free.