Which woman was the sister of XXX?
Liu Yikang
However, Emperor Wen's older sister Liu Xingdi (劉興弟) the Princess Kuaiji secretly feared for Liu Yikang's life, and once, when Emperor Wen was at a feast at her house, she prostrated herself and pleaded for Liu Yikang's life, and Emperor Wen wept and promised to preserve his life, swearing by Chuningling (初寧陵), Emperor Wu's tomb, and he sealed the wine that he was drinking with Princess Xingdi and sent it to Liu Yikang to share with him.
Liu Xingdi