My Wicked Masters by Ann Mayburn
Rhiannon Mirga, known as Goddess at Club Wicked, has a reputation for being a beautiful and unapproachable ice princess. But beneath her hard exterior beats the tender heart of a submissive who yearns for a Master's love despite a nightmare past that makes it hard for her to trust anyone. For Rhiannon there are only two men that can help her overcome her fear, the club's incredibly sexy trainers, Master Rory and Master Liam.
Unfortunately, after a long history Rory and Liam are on the verge of parting ways, driven apart by Liam's refusal to accept Rory's love as anything more than friendship. Despite their own issues, the men find they cannot refuse her plea for help and together they embark on a training session like no other where the Masters are the ones who learn the true meaning of love and surrender.