All Members of the Family Are Weird, Only the Fake Daughter Is Human

[Infinite retracement + no male protagonist + no female competition + smart female protagonist + strange recovery + decisive killing] After the real daughter returned, she begged Su Lingyi to give her her fiancé to her, even if she wanted to die. Just after Su Lingyi agreed, the real daughter's skin was chapped, the corners of her mouth raised to the corners of her eyes, revealing the ring of sharp teeth that spread to the depths of her throat, and she bit off Su Lingyi's head. The next second, the space shattered like glass... When she opened her eyes again, Su Lingyi's heart palpitations still lingered, and she heard the real daughter praying with tears in her eyes, "Sister, I really like Brother Huo, can you give him to me?" This time, Su Lingyi's neck felt cold and she didn't dare to answer easily. The pain of death, even for just a moment, is enough to be frightening. She really didn't want to go through it again. What is the real daughter who can turn into a monster? How many more monsters are there like this? Are the other members of the Su family also monsters? In order to survive, she must find the truth!