Sharing Hailey (Lovers and Friends #1)
Samantha Ann King

After a nasty breakup with her abusive boyfriend, Hailey's looking for a little distance. Headed for a two-week Hawaiian vacation with her brother and his hot friends, Hailey can't wait to feast her eyes on Mark's and Tony's rock-hard, ocean-slick bodies. Even if she can't touch.
But instead of treating her like their little sister, Mark and Tony have a surprising proposition: a monogamous ménage à trois. The three of them—and no one else. Both men want Hailey and have agreed to share her. The red-hot reality is even better than the forbidden fantasy. Until Hailey's ex threatens their newfound happiness…