Sinful Contract with Alpha Callisto

After being rejected by her beta husband, who humiliated and rejected her Luna's position with his true mate right after taking over the pack, Cassandra knew she needed to come out of this marriage to save her dignity. For that, she chose to seek the help of the strongest alpha in return for training his female soldiers. She entered into a contract in return for help, but who would've known this contract with the most dangerous alpha would be the biggest sin of her life, questioning her morals? "When you are in my pack, you need to smell like one of ours," Alpha Callisto whispered before pushing her against the wall with his body pressing hard into her. "But Alpha, that wasn't the part of the deal!!" Cassandra squealed, her breathing heavy in nervousness. How could he think of doing something like this to a married woman? "Well, poor you, I forgot to mention I don't follow the rules," He said before biting into her neck, right beside her mark. Will Cassandra get back her pack with the help of this sinister alpha, utterly unaware that he was the same alpha she slept with all those years ago? Will the alpha help her, or would she just be tortured in his sinful ways because of the way she stole not only his virginity but his sense of smell, too?