Gone Man

Hector Chauvert was enslaved by the Draecan pirates for ten years. He has been rescued and returned to his home city of Shesan -- broken in body and spirit. No longer capable of caring for himself and rejected by his birth family, he agrees to marry a young woman named Sylvie. Sylvie is tired of being treated as a child because she is unmarried and, being barren, she is unlikely to ever be married. So she volunteers for the marriage. Join them on his healing journey.

Trigger warning - while not explicitly described, he did suffer torture and rape and these things are central to who he is now. Later in the book, a character is disabled and has to fight back to health. There are minor characters whose parents try to force them into unwanted marriages.