I'm looking for a fantasy book/series with a specific scene. I remember roughly what happens but not any names.

Two female mages go into a bad part of town wearing fancy clothes and jewelry. They get mugged, then kill the muggers in self defense. Not entirely sure about this but I think the younger one calls out the older for leading them down that path, but the older justifies her actions by reminding her that those men would have probably raped and murdered them both had they not resisted, so they're better off dead.

I rather like that concept and would like to read more but I forgot all the details since I heard about it. Does it ring a bell for anyone?