How does one escape a lawsuit? He was part of the conversation and could have stopped it. He’s obviously made some kind of deal to relieve his bosses of any responsibility. And you can’t get money from a rock.
Bush was the one driving the conversation.
He could have started it for all we know. If anything, he tried to egg Trump on when they got off the bus to meet the female actress who escorted them to the studio set. Bush encouraged Trump to hug and kiss the woman, but Trump simply gave her a peck on the cheek when he was introduced to her.