Well, she does say "pain is my pleasure" in the song...
And, well, as much as we say it doesn't justify what CB did (which obviously doesn't, and yeah violence against women is monstrous though there are horrible women out there that violent men but it really doesn't matter because women are "fragile" and men are not to the society), she was the victim and she is now doing a collab with him, so the message she portrays is that it really didn't matter much for her at all. I mean, forgiving someone for something horrible they did is something. Doing a collab, is much more than just forgiving imo. At least that's how it impacts me, personally. However, I already saw that coming after I bought LOUD and listened to S&M for the first time.