If only life was so simple and predictable. But people, including 'kuffars', and the truth is much more complicated.
There are millions of Muslim males with double standards, who seek out Euro-American Unbelieving women, and then want a virgin from 'back home', abandoning the children they've had with the 'Unbeleiver'.
And I know of many relationships between Christian/Catholic Irish friends which are stable, till death do them part... meanwhile th idea of love develops after marriage is contradicted when I see how many Muslim men, are marrying Muslim girls in the UK, just to get a passport, and they abandon them after two years.
This I witnessed happening to many of my students at college in Leeds and Manchester. It happened to my younger sister.
So your writing is a bit like a fairy-tale. It's one way to organise life but there are zillions of Muslim men acting opportunistically, having multiple relationships and multiple children; even marrying off their underage girls for money. And I haven't even began to describe the immoral beasts who as grandfathers from the 'Muslim' Gulf countries, are like predators on poorer families, marrying their teenage or even younger girls. And they justify it pointing at teh marriage of Asian who was only 9.