She listens quietly, but he doesn't need to elaborate after "I killed everyone inside". Kin recognizes kin. She knows why he did it.

"Yes, I think maybe we have more in common than I originally surmised." She gives him a grim smile. "I risked Marco's life for revenge, once. And getting it made me feel no different. Did it help you?"

She doubts it did. It's easy to trick yourself into thinking violence is what you want when all you really want is some way to turn back time.