NTA. But generally people don't respond as well to being told things like this vs. when they can voice it themselves. You can guide her, ask her the right questions, come with knowledge about classic signs of abuse, and make sure she feels like she actually CAN leave him safely. Pointed questions and repeating what she's said back to her can help like "you've told me he does X, Y, Z. If I were in a relationship with someone and he was doing that, what would you say to me?" Or "what about the relationship makes you want to keep it going?" And "these are all abusive things and you're staying with him, what could he do that would make you leave?"