Books where the MMC/s rescues the FMC and she sees them as her saviors

Basically just mafia/mafia adjacent books where the MMC/s rescues the FMC from trafficking/some sort of bad situation, and she bonds with him, sees all or one of them as her safe person, and refuses to leave him. Kind of like {Hidden Truth by Neva Altaj} or {Fractured Souls by Neva Altaj}

Would love it if there's:
Age gap/size difference
Very spicy scenes
The MMCs are normally terrifying stone cold k\*llers that everyone is scared of, and they're soft with the FMC
MF romance are also fine

Hard no:
Cheating (owd is okay)
Fem dom
FF