Her Big Fat Dreamy Billionaire Ex by Victorine E. Lieske

Felicity should have suspected something when she got hired to take pictures at a resort in Belize, all expenses paid. When she arrives and bumps into her ex-fiancé, Aiden, she realizes she’s been set up. His grandmother is playing matchmaker and every time she turns around Grams is forcing Aiden and her together. But she can’t fall for him again, it was a disaster last time, and she doesn’t want to repeat the past.
Aiden can’t believe Felicity is at his resort. She broke his heart five years ago, and he’s determined not to allow it to happen again. But one disaster after another keeps forcing them together and he’s sure Grams is behind all of it. He’s just not sure how long he can hold out without pulling Felicity into his arms and confessing that he never really got over her.