American Historical Romance

Hello I am looking for An American historical not
really a western. The heroine is a "plain" school
teacher for a small town. The he is a investigator
with a gorgeous partner that everyone thinks
solves all the cases but its really him he is seen as the slacker. He is caught in the her house overnight and they are forced into marriage. While looking into cattle murders for her bestfriends fathers ranch. They both fall down and old mine shaft he is badly injured. Is sent to the hospital. He starts feeling sorry for himself and never wants to see her again. She moves close to the hospital and becomes an architect building him a house with rails that he can get around in. In the end they are seen to have a small son.

Still looking if you have any questions