The seduction of Lady X

Harrison Tolly, the illegitimate son of the Earl of Ashwood, finds out that he is the rightful heir to is father's estate. He's about to be married, has a child on the way, but his heart belongs to another woman. When Olivia Carey's husband dies, will Tolly take the chance to marry the woman he loves instead of her sister he's marrying to save the family from scandal?