Penum Dragon by Zoey Harper

She thinks her darkest secret is history. She’s wrong.

After months of building himself into a better man, Penum, a ferocious fighter, is ready for love. When his team rescues his curvy, spunky crush from his academy days, he knows he’s found his mate. Now he has to convince her that he’s not the arrogant guy she knew.
Sasha’s life has taken turns she could never have imagined. Being kidnapped and months in a maximum-security prison, make her take a good look at herself. Soon, she’s rescued by a group of dragons, one of whom is a blast from the past. His bright green eyes and sexy body drive her crazy like they did years ago.
When Penum shows Sasha the new and improved him, she’s torn. A future with him would awaken the nightmares of her past. But she’ll soon learn that not all the horrors from years ago have been put to bed…