Rosemond was smart and gambled to change her life. She had wrapped up her wounds and sold them to Lucio, in exchange for empathy from the Emperor. Not stopping there, she dug into Lucio's wounds, pretended to comfort him, and made him depend on her. As if no one else could understand his secret and shocking wounds. As if she was the only one who could understand and accept him.
His trauma was the Achilles' heel that made him most vulnerable. Rosemond's scheme was successful. Lucio was forced to fall in love with her. There were many women taking their clothes off in front of him, and women seducing him, but no woman like Rosemond.
In addition, the fact that she had a big wound, similar to himself, also served as a safeguard to prevent Lucio from throwing away Rosemond. Rosemond was convinced that Lucio could never abandon her when she was so full of wounds. And Rosemond's thoughts were generally correct.