Looking for a gift for my wife (strong male bond, fantasy, raw emotions)

Hello everyone,

I would like to gift a book to my wife because I enjoy it when she enjoys reading a book. Unfortunately we don't have much overlap in our themes, so I'm not sure what to gift her.

About three years ago she picked up Sanderson's Mistborn-books, which she read back to back.
Then she read the Captive Prince books, which are her favorites so far. She's very active in the Captive Prince-Tumblr-sphere now. It's been two years since she first read those books and she's still actively invested in the story, themes, characters.
Afterwards she read some spicy gay hockey-themed and other romance books, which she/we enjoyed.
Sarah J. Maas books were OK for her, but I think she mostly enjoyed them because she was reading them along a few friends and they were sending each other parts that they found funny.
Then she read some books with a love triangle between 2 male angels and a human woman, and the wing-size somewhat related to the size of penis' – I cant remember which books that were. I know that she didn't finish the series though.
She then read multiple interpretations of Robin Hood (childhood favorite of hers), and then some vampire stories.
The latest book series she just started is "The Last Sun" – which she so far seems to be very much enjoying.

There are a couple of themes she discovered she enjoys:

• Strong male bonds (romantic or non-romantic, I will die for you-like bonds)
• Emotional suffering – not suffering-porn/torture-porn, just emotions described in such a way that they leave you feeling raw. Not just "and then he was sad".
• She mentioned repeatedly that she enjoys reading especially about men "suffering" from/under/with emotions
• Women with a purpose – Lady Marian in some of the Robin Hood interpretations was nothing but a swooning damsel whose vocabulary consisted more or less of "please, Robin, yes", and it made my wife mad. If there's an important woman in the story, it would be great if the book passes the Bechdel test.
• if spicy/steamy then it better not be written for a male audience. We compared spicy fantasy books I was recommended vs. spicy books she was recommended. In "my" books were lengthy descriptions of penis sizes, how deep it went, veins, hard as, thick ropes of his seed, … while "her" books focused on feelings (of heat, touch, electricity, empowerment, connection, submission, …). Her books still were explicit, but the way it was described was very different than it was in the (spicy fantasy) books I had at hand.

While my wife and I have some overlap (Sanderson, spicy romance), I read 80% progression fantasy/lit rpg with some regular fantasy, sci-fi and thrillers mixed in. The Captive Prince-books were a total outlier for me to read, and since it's her favorite so far I have no clue what I could possibly gift her.
I'd appreciate any suggestions you might have, so that I can look into them and check if I think it fits her.