she is gambling that he is good
Roe v. Wade v. David Foster Wallace in the New Yorker:
But neither did he ever open up and tell her straight out he did not love her. This might be his lie by omission. This might be the frozen resistance—were he to look right at her and tell her he didn’t, she would keep the appointment and go. He knew this. Something in him, though, some terrible weakness or lack of values, could not tell her. It felt like a muscle he did not have. He didn’t know why; he just could not do it, or even pray to do it. She believed he was good, serious in his values. Part of him seemed willing to more or less just about lie to someone with that kind of faith and trust, and what did that make him? How could such a type of individual even pray? What it really felt like was a taste of the reality of what might be meant by Hell.