(Spoilers for those in the comments)
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So apparently fron what I've read, the male lead was apparently testing the female lead, he wanted to see if she would choose to be with him willingly. Anna tried to leave back to her original world, but she's caught and Roth takes her ability to walk, so she can never leave him. He marries her again and she has to use wheelchair for the rest of her life.
Making her disabled was not enough for him. He won't let anyone else but him operate her wheelchair, but he prefers to just carry her in his arms to make her completely dependent on him. She can't go literally anywhere without him, so most of the time she has to stay alone in her room and wait for him to take her out. She gives up and accepts her situation because she now believes that she deserves it for leaving him and their son.

I read spoilers for the novel of this one, and holy shit, the ending and the ML are somehow WORSE than both Under the Oak Tree and Cry, or Better Yet, Beg. I HATE this guy.