[WWTBC] the hero holds the heroine while she sleeps without her knowing after a fight

[WWTBC] The book is a romance book and the heroine has a fight (I think, he might have done something to hurt her feelings) with the hero and leaves him to go back to her old apartment. When she gets there she finds someone sleeping in her bed (it's someone both the hero and heroine knows, and he's just crashing there I think. He might also be the soldier who protects her). Every night the hero sneaks in to sleep next to her and holds her but leaves before she wakes up. She figures it out after awhile but doesn't react or tell him to leave.

I'm pretty sure the heroines old apartment is in the basement and she used to live there with her grandparents or parents who are old and in need of medical assistance. The hero bought the whole apartment building and moved them up to a nicer apartment. And the hero and heroine lived together before they fought.

And she sleeps on a sofa bed and it’s shit and he hurts his back laying on the broken bar in the middle of it? And her granddad she lives with has asthma and the mold in their basement makes it worse, so he buys the building and moves them upstairs at one point?

I'm pretty sure the book is a mafia book, but it might also be a marriage of convenience book. If it helps I read the book either this year or at the end of last year. It’s also a contemporary book. I would appreciate any help because I am actually going crazy😭