Omega Luna's Revenge: The Substitute Mate

Being an Omega seemed not easy, especially after my parents, the only ones who truly loved me, were brutally killed. With their loss, my last trace of hope shattered.
From then on, I grew up amidst hatred, with my life's sole purpose being to avenge the individuals responsible for my parents' murder.
And then, on the day the Alpha's daughter rejected an arranged marriage and asked me to take her place in marrying the brutal Alpha Jacob, I discovered he was the person who had taken my parents...