Her Tempting Protector by M.D. Dalrymple

When a Marine shows up to help her steamy summer day, she thinks he’s a hero.
She’s wrong.

David:
He has a tainted history as a petty criminal, and joining the military was his best and last chance to get him out of that cycle of crime. Now a Lance Corporal, he has turned his life around.
For the most part.
His fellow Marines know his background and call him Gangster, but he hides his background from everyone else. Including from the attractive, dark-haired banker he sees stranded on the side of the street with a flat.
When he comes to her aid, he looks like a hero. And he wants to be that hero for her. In fact, he’s willing to do anything for her.
But he’s keeping a huge secret from her — that he’s a long way from being a hero, and atonement and change takes more time than David wants to admit.

Serenity:
She has her own secrets, a big one that works hard to keep under control and hides from the world, including from the handsome blond Marine who helped her fix a flat on the side of the road.
The least she could do was offer him a cold drink on a hot day.
He accepted, and who knew that it would lead to a passionate relationship.
Her friends tell her don’t date a Marine, that they can’t be trusted.
Yet she’s hiding her own secret. Does that mean she can’t be trusted?
No matter what everyone says, Serenity is willing to risk it all for this strong man who loves how she maintains her control.
But will he stick by her when she loses control and he learns her secret?

Sometimes worlds collide and love blooms amid the chaos. Will Serenity and David’s love flourish in the chaos, or will they crash and burn?