Her Convenient Husband's Return - Eleanor Webster

The author was careful to lead the reader down the road of this blindness being hereditary and she also has a non-neurotypical brother.
Beth married a childhood friend to escape debt and a predator. Then her husband left for a life of debauchery until his brother dies and leaves him with the estate. He doesn't feel like he deserves the title as he is illegitimate (someone needed to point out to him that the only parent anyone at the time could really prove was the mother). She still fears her predator, who wants her lands and her innocence and also fears passing on the blindness.
It does have a solid dose of crazy-sauce (Blindness! Illegitimacy! Drug Addiction! Predator older man!) it read well and it was interesting. I had fun reading it and it kept my interest. I got where a lot of the characters were coming from and felt that the growth in the relationship was well done.