After Being Cheated On, Marry His Brother and Become His Sister-In-Law

Looking for a Melodramatic Novel I Only Remember by Its Plot

A rebirth novel. One plot point has the female lead wearing skin-colored clothes in a hot spring, with steam rising to make it look like she's naked. She forces the male lead's brother to help her with something. When the male lead finds out, he thinks she was naked and gets angry.