"It seems like it must have been." It doesn't take more context than he has to gather at least that much. "She did not tell me many details, but it was clear that was not the beginning or the end of your stories. Yours or hers." He doesn't mind hearing more, if she feels moved to share it. But he's also sympathetic to the way one event can lead to another in a way that seems nearly inevitable at the time but disastrous in hindsight. And the world they come from seems especially unforgiving.