Chi Yan Trope - FL Reborn Sister Swap

There are so many of them (and yes, An Zi Yan did at least two of them)

Sisters marry into the wealthy mansion. Di sister marries the Shizi, Shu sister marries the playboy. Wedding night there is a swap but the Di sister catches it and they switch back. Shizi and Shu sister murder the Di sister.  They get reborn and Di sister decides not to switch back after the swap and she stays married to the playboy. She reforms playboy into a scholar. Hijinks ensue. Playboy might also be a time traveler or transmigrator.