His Back Pocket by Debra Kayn

Sometimes, secrets are kept to protect the one you love.

Tana, a biker who rides for Serpentine Motorcycle Club and works at Glacier Crest Ranch, is locked in a passionate battle of wills with his fiery redheaded wife. Their love is a whirlwind of fierce fights and sizzling make-ups.
Just when they are on the verge of living under the same roof again, Tana is arrested and sent to prison. In his absence, Mia must navigate a year alone. A year that threatens to break her spirit.
In the darkest hour, Jack, a cowboy from Circle M, becomes an unlikely friend to Mia.
When Tana’s sentence ends, he races back home, only to find another man lurking in the shadows of his life. As a proud Native American, he refuses to let anyone else lay claim to his woman.
He’ll fight with the fury of a thunderstorm to win back the love that has always been his.