As one of the 90 Day podcasts I listen to puts it about Nicole, "something happened on the way to heaven." As in, there is something very dark in her past, above and beyond the bizarre relationship she's in. Mahmoud is not the greatest human being, and a terrible husband, but at the same time she is actively trying to make him miserable, as if in payback for how traumatized she was in Egypt. (And if you watch that season, she looks like she's in shock half the time.) Her home is full of items seemingly calculated to rile him up, like pictures of naked women with luxurious downstairs hair, and Hieronymus Bosch's "Garden of Earthly Delights" as a shower curtain. (I actually kind of want that too, but all of my bathroom showers have doors, lol.) And then she wears clothing that is cropped -- but only slightly -- or has a small amount of exposed skin, knowing that Mahmoud will lose his mind. Yes, he needs to get used to her wearing clothing he doesn't approve of, but she is being needlessly provocative.
TL:dr -- they both suck.