Just the Thing by Marie Harte

Gavin Donnigan left the Marine Corps a shell of a man, hounded by guilt for deaths he couldn’t prevent. But teaching a self-defense class at the local gym brings some stability to his life―along with a gorgeous leggy woman who won’t give him the time of day.

Zoe York lost her twin sister to a freak car accident a few months ago. She’s been struggling to bury her grief, but it isn’t until she signs up for a self-defense class with its distractingly hot instructor that she begins to come out of her shell again. With the memory of her sister telling her to live a little, Zoe decides a fling with buns-of-steel Gavin Donnigan might be just the thing.

Soon they’re sparring both in and out of the gym. And for the first time in a long time, each is looking forward to tomorrow.