What Should I Do After Becoming the Female Lead's Best Friend?

Gu Jin transmigrates into a book. The heroine, Cheng Xin, is her best friend and cousin. In the original novel, the heroine is surrounded by top-tier men and receives everyone's affection. As a supporting female character on the side of righteousness, Gu Jin gets to enjoy the leftovers when the heroine gets the best of everything. She is lucky enough to end up with one of the men, and both cousins live happily ever after. Just as Gu Jin is getting ready to cling tightly to her cousin's golden thigh, she discovers that the body she's transmigrated into belongs to someone who has been reborn! . From the reborn woman's memories, Gu Jin learns that her married life was far from happy. Whenever Cheng Xin has a fight with the male lead, she calls Shao Chong, who is already Gu Jin's husband, to meet up and confide in him. After this happens several times, Gu Jin tactfully reminds Shao Chong to keep his distance. He tells her not to overthink it: their relationship is purely platonic. On the day Gu Jin is kidnapped, her wonderful husband is at the hospital with her cousin while she gives birth. . The reborn Gu Jin no longer dares to play a supporting role in her cousin's love story. The Gu Jin who transmigrated into the book smiles. No one is born to be a bystander in someone else's love story. In this life, she will be the star of her own! Theme: To be added