"Consider what that signature meant to him. Rearden Metal was his greatest achievement, the summation of the best in his life, the final symbol of his pride.... Rearden Metal was more than an achievement to him, it was the symbol of his ability to achieve, of his independence, of his struggle, of his rise. It was his property, his by right--and you know what rights mean to a man as strict as he, and what property means to a man as possessive. He would have gladly died to defend it, rather than surrender it to the men he despised. This is what it meant to him--and this is what he gave up. You will be glad to know that he gave it up for your sake, Miss Taggart. For the sake of your reputation and your honor. He signed the Gift Certificate surrendering Rearden Metal--under the threat that the adultery he was carrying on with you would be exposed to the eyes of the world...." (page 789 of the Signet paperback edition)
The cashing-in for Lillian is her revelation of betrayal of her husband:
"It was I," said Lillian softly, "who informed the bureaucrats about my husband's adultery."
Dagny noticed the first flicker of feeling in Lillian's lifeless eyes: it resembled pleasure, but so distantly that it looked like sunlight reflected from the dead surface of the moon to the stagnant water of a swamp; it flickered for an instant and went.
"It was I," said Lillian, "who took Rearden Metal away from him... You can't buy your way out of it, with those dollars which you're able to make and I'm not. There's no profit you can offer me--I'm devoid of greed."