In "A Complicated Kindness" by Miriam Toews, what kind of mennonite is Nomi?

I am currently reading "A Complicated Kindness" by Miriam Toews as an English ISP book. However I am having a difficult time understanding what is happening. The reason i think that is is, all that i can picture is a horse and buggy mennonite. If anyone know what type Nomi actually is, i think that would really help. Thanks :)