Reborn Princess: The Shadow She Commands

Shen Ting had a private army no one knew about, and after Xiao Jinning helped him to his marriage he turned it on the Xiao clan and killed all of them. She had loved him. Shen Xiao had been in it with him from the start. She comes back to life at a point before any of that. Shen Ting's power is still unmapped as far as she knows, so she keeps her hatred to herself and waits. She takes Shen Xiao in and brings him up as her own, intending to make a weapon out of him. She works on Jiang Jihuai to bring him over, and she looks for Meng Jue, and the revenge gets laid out piece by piece. The Shen Xiao in her household is Ling Yuan under a borrowed name, sent in to find whoever commands the Gu poison. What he turns up is that Xiao Jinning is the person who saved his life years before. He is pulled between hating her and wanting her, and when she is in danger he stops resisting it and goes ahead of her to clear what is in her path, asking for nothing except that she think well of him.