Forever Faithful by Ginny Sterling

Dreamer, aviator, and certainly not the man she expected…
Harley Petersen knew falling for a man in uniform was a mistake. A relationship with a pilot would end in heartbreak, especially when it is her twin brother’s wingman. Stolen moments long ago only deepened the connection between them that she kept hidden away deep inside… until Jackson came crashing into her world once again.
A love he couldn’t forget…
Jackson Sloan knew his best friend’s sister was definitely off limits—despite their soaring feelings. When he broke Harley’s heart years ago, he knew nothing would ever be the same. Uncontrollable emotions had skyrocketed, surging upwards at a breakneck pace, resulting in a kiss that could be nothing more—or could it?
Now Fate has given this lucky Flyboy a second chance at love.