Its the climax of the story
Also pls to anyone who wants to see abuse and her being so down and having abuse marks, read the novel instead. I felt conflicted at first but now i believe it was for the best.
I think the adaptation team realised how much abuse and body harm was romanticised in the novel, like thousands of other FL in k-novels.
Always needed to be abused so we could feel bad for the fl and see her 'broken self' be eventually fixed back by the ml.
No matter what, the story still makes sense. If not, then just imagine what happened in the novel and think it was actually that.