Mahou ga Toketa Cinderella

To be a wife or a servant... I am forced to make a cruel choice… In the cold weather, Amelia visited an old castle in Spain to meet her first love, Theo, Duke of Marinselli, whom she once called her brother-in-law. Even after her parents split up, she still couldn't forget him, so she snuck into a masked ball held in autumn and spent a passionate time with him without revealing her true identity. I never expected to get pregnant, but I won't ask for anything. I'll let him know, and then I'll live as a single mother. But when she told him she's pregnant, Theo took Amilia away to his villa in the mountains and coldly told her that she would be treated as a duchess only if she slept with him.