They Confiscated My Family's Property Right After We Reunited, and the Entire Marquis's Household Begged Me to Take Them In

She is the true daughter of the Marquis's household, switched at birth. Just after she is reunited with her family, the Marquis's household is confiscated. The men are exiled, and the women are reduced to commoners. The whole family moves into her home and still dares to give her attitude? Is she a herb-gatherer? No, she is the leading authority in the empire's medicine trade. Medicine, mechanisms, killing: she can do it all. Her home is no place for idlers. Want a meal? Earn it yourself. Want to pin the blame for the confiscation on her? Then she'll teach them what it means to be a decent person. Her only problem is her fiancé. The Marquis's household has fallen, and he still wants to marry her? Thrown out by his family, he asks her to take him in? Shen Qin wants to break off the engagement, then decides she might as well kill him. But he follows her everywhere. When she kills, he cleans up. When she makes money, he handles the trouble. Until he faces Princess Yuzhu, the one who caused the Shen family to be ruined... Shen Qin realizes this man might really be willing to give his life for her.