Billy Joel and Christie Brinkley explain how their marriage deteriorated despite wanting it to work, citing his consuming work schedule and her growing loneliness.

“I don’t think it’s a secret that his drinking got pretty bad,” Brinkley said in Part 2 of the musician’s new HBO documentary, Billy Joel: And So It Goes. She said that the singer “couldn’t really remember what he did when he was drinking, and so he didn’t really know how he could hurt people.”