He didn't tell her about the money because it would lead to questions - both about the money and the fact that he had been hiding it from her.
She was annoyed because she feared it would lead to unhappiness.
Thinking about Cade in that way could lead to no good.
Frankly, I'm petrified what I experienced last night might somehow lead to more of the same; people poking sticks at my psyche.
He anguished over the possibility, fearful he would be so horror-stricken he'd wake and miss the telling information that would lead to a capture.