My Ex Dumped Me... So I Become His Stepmom

On the wedding day Andy Shaw announces that he will be taking a second wife at the same time, and that she will hold the same standing in the house as Sophie Hall. Sophie had been matched to him because the women of her family conceive easily and the marquis house in the north needed children, and Andy had been adopted into that house and named heir apparent. She breaks off the wedding then and there and marries Sylas Shaw, the Marquis himself, the man who adopted Andy in the first place. Andy will not have it and works against the marriage quietly. What he has been doing gets found out and he loses the position of heir. Sophie conceives the Marquis's own child and settles into the household.