u/AlertPizza2118

I'm trying to find a drama I've watched, maybe 2025? It involved a girl whose family ( mom,dad, sister) were killed by a roving gang of nobles. She was able to escape (maybe fell from a cliff) She was later adopted into a noble family. Her " brother" ,the heir, was married to the sister or relative of one of the FL's family's murderers. The FL take revenge by seducing the Heir and appearing weak, using the "sister" role to be close to the couple. She uses the Heir as her blade to get revenge on the nobles.