Nü Shoufu Zhi Jiaochong Shezhengwang

Dayan's richest woman, Wen Jiu, struggled her entire life to make her fortune. However, she was betrayed by a devious childhood friend, which cost her both her money and her life. When she woke up, she found herself back at 15 years old again, just as an old enemy was coming to claim her for marriage with his fifth brother! Knowing that the handsome man in front of her will one day become the powerful regent, Wen Jiu decided to play nice with him: I'll make money to support our family, elder brother please be at ease! But in the bedroom on her wedding night Wen Jiu was stunned to find... elder brother? What are you doing here in the wedding chamber!! (Source: Kuaikan, translated)