Chasing the Luna he never noticed.

From the back cover

Alpha Duncan Preston is a Billionaire and the Alpha of the Silver Warriors pack; he possesses everything a werewolf would die for and everything a she-wolf would give her life for. The wealth, the power, and Mindy!

Everything was going swimmingly for Mindy until she reached the age of eighteen. She had no idea that her mate would turn out to be her older brother, not even for a second! Duncan Preston, the Alpha!

She believed it was all a trick of the mind, and she tried to keep her emotions hidden. For the simple reason that Duncan never showed her anything of his feelings, if she was his true mate, why didn't he tell her so?

Duncan realized a long time ago that his adopted-younger-sister is his mate, despite the ten-year age difference between them. That's why he decided to find another Luna in order to keep the secret of Mindy's adoption a secret from the pack. He had made a promise to his deceased father that he would never, ever reveal the adoption secret to Mindy.

Would Alpha Duncan be able to keep the secret and never reveal it despite all of the irresistible affection that she has for him?

Or the bond between them was stronger than either of them could have imagined.