First things first, the name Emma Darcy is odd. Emma by Jane Austen who also wrote a book with a Mr. Darcy. Anyway,  though the plot needs a lot to be desired, the h who has spunk and is quite a personality and to be honest, she would probably do better without the H who cheated on his wife (alive and invalid!) and who made her pregnant. One thing though, she should not have been a bit harsh to the H’s daughter.
That getting blind though, it was a bit overboard.
The HEA seems forced. The H should have been made to work hard before he is involved in the lives of the h and their child.