i forgot again...

help me find that one historical romance manhwa i liked 2 years ago (or something), from what i remember MC died after finding out that her sister betrayed her and then she woke up again before her death, uhm mc has gray/white hair, the sister has pink hair, and the ml has blonde hair and red eyes. UHMMMM, i think the first chapter started in a banquet where the mc kissed the ml (i think she provoking her sister cus her sister likes the ml who is also the emperor of their country)