If you decide to go into this book, you must understand this: it's not really a romance.
It's far more akin to just straight historical fiction, with a decent focus on how the main character, a noblewoman in 14th century Turkey, is essentially viewed only in the lens of a this exotic, sexual fantasy that all the men around her wish to experience, constantly mixing up love and lust, which is probably where the labeling of "romance" came into being.
It reads very much like just telling the life story of Theadora, rather than trying to showcase some grand, incredible romance she experiences because, frankly, anytime anyone claims to "love" or "be in love" it's in a very sexually charged/attraction based way. It's more about powerful men exerting their power and Adora trying to make the best of her circumstances than mutual respect, understanding, and fondness.
Like, the way the author describes 13 year old girls as being "women" and having adult men assault them really detracts from this having the qualities of a romance novel and often feels more so like something I'd see written in a biography of a historical figure. The author even describes one of Adora's older sisters, at age 13, as having a plump golden breast and lust in her eye who rubs her budding breasts against the backs of young soldiers as they're fleeing the city after the death of the previous sultan--like damn, right out of the gate. It's very weird.
(also, the author is bad at math; she goes to the trouble to describing the amount of time between the birth of each of Adora's siblings but fucks up the numers in compounding ways; this would all have been solved had she just written their names and ages straight out instead of trying to be like "sophia followed after 18 months later and then the youngest was four, with her brother two years older" like it's a fucking math problem you get in elementary school)
The male lead is more focused on Adora being this highly sexual creature "made for pleasure" than on any quality of her personality--in fact, he often seems to resent that she's smart and thinks she should shut up and spread her legs for him. He even blames Adora for losing her virginity to her husband, his father and the sultan, and wants to hurt her over it and eventually comes to like, regard her as a "whore" he rapes and wants to force into his harem against her will despite this being a really stupid way of feeling when he fully understands that she was forced into all this as a child and proclaimed to love her and want her as a wife.
Like it's all just very stupid and unappealing in a "romance." But like, in a historic kind of mindset, you could see how Murad, even as terrible as he is, would be more appealing to a woman who's gone through a lot of shit over her husband who was even worse than his terrible son.
Even the slightly better romantic option of Alexander (who is called Alexander the Great very confusingly because the figure you think of when you hear that was alive in like 300 BC, and this is taking place in the 1300s AD, so... why on earth the author chose to name him that is beyond me) who appreciates Adora's mind and talking to her as a person, is so wrapped up in how badly he wants to fuck her that he drugs her and, in her altered state of consciousness where she can't consent because she thinks she's in a dream, rapes her just because he couldn't accept that she said no.
Overall, Adora's life is pretty sad. Her father sells her off. Her husband is an old man that brutalizes her. She's forced to get pregnant at age 13. The man she thought she loved is a creep who seduced her at 13 and blames her for everything that happened with her husband. Everywhere she goes a man tells her she should shut up and fuck him because she was made to pleasure men and nothing more. Her family basically abandons her. Her sister tries to have her and her son killed. The man she thinks she loves rapes her and calls her a whore. Her son kind of turns into a monster. The world is falling apart with war in the Middle East between Muslims and Christians and the fall of Constantinople.
I ended up cutting off before chapter 13, which is the start of part 3 where I believe she reunites with Alexander. I skimmed a little to find the ending and it's basically just, she eventually gets with Murad, has another son, the son grows up, Murad eventually dies because of war, the son marries a European woman and becomes sultan of an empire, Adora lives to be old and gray, she passes and reunites with Murad in the afterlife.
As I said, it reads much more like describing the life events of a historical figure than a romance. If you go into this read with that in mind and ignore all the author's weird attempts to make it seem tantalizing (every time she described a child as having cone shaped breasts with long coral nipples I wanted to die), it's actually pretty good historical immersion with nice writing (although the copy I read never capitalizes titles like it should, like, if a title is attached to a name, it gets capitalized, i.e. Lady Adora/Princess Adora, and when it's not attached and isn't being used in place of a name, it's lower case.
I just didn't particularly want to continue with the sad life story of a woman who got like 0 sympathy for how much trauma she endured from the age of 10 nor did I want to swallow the 1947582th description of sexual abuse towards minors and children, so I didn't want to continue knowing the truth of the kind of book I was reading.