Duke Jing's younger sister

(Fictional, no time travel, no rebirth, 1V1) In the home of Shen Beiqi, the Duke of Jing, there is a little sister who is as gentle as a white jade flower, named Shen Li, and everyone calls her the Third Miss Shen. She has a person buried in her heart since she was a child, and no one knows except herself. Shen Li's real name is Jiang Li. When she was eight years old, her family suffered a sudden change, and her father and brother were exiled. Shen Beiqi was good friends with Jiang Li's brother, and was entrusted by him to take Jiang Li as his sister. Due to an accident, Shen Li spent a night with her brother, and what was even more terrible was that not only did the instigator forget everything, but she also accidentally became pregnant. Shen Li did not want to disgrace the Shen family's reputation, and was willing to forget about it, but she was accidentally involved in the bloody storm of the succession...