Pregnant Concubine

My mother was coaxed into being a fertility tool by my father. Her successive pregnancies made her aunt jealous, causing her to die three times. Because of the reputation of Bo Xian, my aunt reluctantly left me to fend for myself in the house. My father had no children since then, so he devoted all his fatherly love to his sister-in-law and helped her ascend to the throne of the crown princess. But my sister-in-law had been married to the prince for many years and had nothing to do, which made the emperor and empress dissatisfied. She simply took the initiative to let me come into the house as a concubine and give birth to a son for her. And I inherited my mother's innate fertility constitution, so getting pregnant is an easy thing. Soon, she will understand what it means to "lead the wolf into the house".