The Duke's Modern Matriarch

Helena Shen uses her modern knowledge to become the wealthiest woman in business. She helps her love become the Duke Who Guards the State, and they start a family. Her granddaughter, Mabel Harrison, raised under Helena's ideals, believes in gender equality and monogamy. Her grandfather, Duke Harrison, famous for doting on his wife, decides to take a concubine, causing an uproar.