Steph puts the coffee down on the table, her hands don't feel steady enough to hold it, but she manages to look up at Kate as she answers.

"Because it was him or me," and that's true, she knows if she hadn't killed him, he would've killed her, "But I went there with the intention to kill him, and I won't lie about that."

She doubts that's really the answer Kate was looking for, though, so she expands on it, "There are no authorities to take them to, we don't have the resources to hold them ourselves, and it's unlikely that just beating them down will get them to stop." That's the crux of it, for Steph. The militia need to be stopped, and this seems to be the only wa they can do it.