Six Years After My Birth Mother Died, My Scumbag Father Went Mad

My mother was the fake heiress in a fake-versus-real heiress story, while the real heiress was my father's one true love. Dad bullied Mom until she miscarried, then forced her to give the real heiress a kidney. At last, she was free. She died. Six years after Mom's death, Dad suddenly regretted everything. He threw the real heiress out and knelt by Mom's grave, begging her to come back to him. Everyone thought she would never return. Only I knew that Mom had always been by my side...