The Regent's Sweet Fake Bride

Shen family's legitimate daughter, Lila Sterling, with the mental capacity of a seven-year-old, is framed by her stepmother and half-sister Shen Ruolan, who force her to marry Prince Regent Alistair Hawthorne, known for killing his wives. He softens by her gentle purity. They support each other, uncover grudges, quell rebellions, and guard the empire.