Isn't She My Sister? Why Did She Become the Sponsor?

[Double heroines, double cleansing, he] Qin Jue has always been the oldest child in the orphanage. After Jiang Jingxian appeared, she had a sister. This sister was very beautiful. Although she spoke little, she was very kind and gentle to her, just like the sister she imagined. She liked this sister very much and was determined to protect her for the rest of her life. But one day, her sister suddenly left without saying goodbye. When they met again, Jiang Jingxian, who had not been heard from for many years, suddenly appeared with a contract and threatened Qin Jue to become her lover. How can people accept that their childhood sister suddenly became a financial sponsor? Same-sex marriage background, fictitious reality and world view, don't take it seriously [The two are not related by blood, sister is just a name and emotional dependence] [My elder sister is a fishing person, but she is good at it and loves to play] [My younger sister is shy easily but will bite when pushed]