Afterglow by Artemis Anders

Teagan has sworn off men.
And why shouldn’t she, after getting her heart shredded by her cheating ex? Now, she only wants to enjoy summertime in the Colorado mountains and build her fledgling career as an author. But when a friend’s party means facing her ex and the woman he left her for, Teagan skips town and heads to the scorching heat of Arizona.
She never expects to meet Aaron, an Army Major who’s smoking hot… and also coming off a divorce. He’s so not her type, but he gives her two days and one sizzling night to remember.
When Teagan returns to Colorado and her man-free existence, Aaron keeps finding excuses to see her and inch his way into her heart. But when Aaron’s past finds them, it threatens to shatter their connection… and break Teagan’s heart for good.