Help me find it!!

Manhwa wherein the FL is the villainess and she does the most heinous activities i.e killing and framing ppl, it's historical but like ballroom?? Dunno how to explain. She has blonde hair or brown and wears extravagant puffy dresses but like not toooo sparkly ykwim? There's this one panel where she's on a staircase and she shows the male lead her scars on her body PLS HELP ME FIND THIS OML IVE BEEN SCOURING THE NET SINCE LAST YEAR