1 Book Found

Based on your description:

"whats the name of the old romance novel where the man marries a woman to save her estate and finds out she was abused by her exhusband. He used to make her service his friends sexually when he was drinking. So her new husband bounds himself so she can feel safe during sex. Her ex husband kidnaps her and puts her in a maze. Turns out her new husband is the older half brother of her ex husband and heir to the fortune. Published before 1993 Setting in the new england area"