What do you do as a woman in late 19th century America if you're kinda crap at everything, average looking with no brains and no skills, and a father who decides for no apparent reason to marry you off to a lecherous old deacon? You become a mail order bride, take a train to Texas and land a handsome cowboy (one of three triplet cowboys too), what else!!?
As for environment, it is set in Texas, but for all the description we get of the environment it could be set in a random field wherever. The closest we get to an environmental description is a disagreement of whether it is hot enough to dunk your head in the horse through, or not.
I couldn't actually decide whether this was just a pastiche or seriously meant, but what I do know was that it made me want to rewatch "Seven Brides for Seven Brothers". This novel was kinda like that, but without the singing and the dancing, which happen to be the best bits of "Seven Brides for Seven Brothers". The main heroine (the three triplet brother marry three sisters, no kidding) was also the kind of of leading lady who weeps her way into the hero's mighty lovin' arms since she is so fragile and petite and just all around afraid of everything, including the dark, cooking, the cellar and most of the time her husband and his horse. I find this trope more annoying than the hero's mighty thews and soft brown eyes, to be honest. Even more mind boggling than that, the novel actually has a sequel, which tells the same story, but from one of the other three sister's and triplet cowboy's perspective, because everyone really needs that!
On the other hand, you know, I am now going to walk around the house bellowing "BLESS YOUR BEAUTIFUL HIDE" and "I'll pay your way through cooking school if you'll only say yes."