Spoiler!
FL believes she possessed body of Sheriel, but in fact, she is actually Sheriel. She is a regressor and already lived one life which is basically the novel she read about that has her son as ML. Of course that novel "Torn Wings," her son is the ML so there's not much about Sheriel except how awful person she was to her son. So FL (who thinks she still possessing the body of Sheriel) becomes curious as to why Sheriel treated her son and husband bad, even though, everyone around her doesn't want her to regain her memories cause they're scared she will go back to the way she was before. Initially, she thinks it's alright to not know, but she ends up wanting to unlock the memories. She still thinks she and Sheriel are separate people, but occasionally as some little bits of memories leak in and how her feelings of wanting to love her child and husband seep in, she starts to get confused if she's feeling what Sheriel is feeling or if they are her own feelings. She asks her maid and ML to help her with her memories, but both are hesitant to tell her. Eventually, she has a dream and talks to her younger self. Her younger self tells her to meet her father, the Count, if she wants to unlock the memories, even if it's painful. She meets the Count after he barges in one day. The ML is not there because he had to visit the Emperor and he told everyone not to let her father in because ML already knows what a bad person the Count is. He also didn't want FL to meet with the Count cause her memories might come back. But FL does anyways, and she meets the Count so all her memories come back after talking with the Count. This scene is sad and cute cause her son was her little knight, trying to protect his mama.
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Niyati012