The Mute Mate: Moonlight and Betrayal

Fiona never expected her life to get this bad. A sudden rogue attack wiped off her pack, turning her into a mute and wolfless orphan.
She once believed that being mated with her crush Michael was compensation for her miserable life. However, it just made her life worse. What could be more suffering than your fated mate unwanting you and even your child?
Michael already picked himself a perfect Luna but fate gave her a mute mate. And owing to his father's last words, he had to marry Fiona to get his rightful Alpha position.
He married her yet kept their relationship unpublized. He hated her but wasn't ready to let her go. Everyone believed Fiona would bear and wait like she always did until Michael finally could make a decision.
He's her husband, her mate, and her Alpha, and taking in everything he wanted without complaining was her duty.
No one expected she would be the one who asked for a divorce and even dared to run away carrying his heir.
Michael swore to make this little omega pay but why did his heart break when she returned smiling at some other guy?