Married to my family's enemy son

"You are getting married to Damien McMillan, the eldest son of the McMillan family" --- Claire was told to get married to a man she barely knew because of business income and public rumors. The McMillan family had been their enemy and business rivals for over ten years and all of a sudden, she was getting married into that same family. She couldn't object even if she wanted to because she was mute. Because of her disability, her family treated her like nothing and they only saw her as a tool for cleaning up their mess. Damien McMillan on the other hand was twisted. No one knew the real him because his attitude and intentions were hard to detect. Damien was also facing the same cruel life as Claire - cleaning up his family mess because he was a half-breed (stepbrother). Even if they saw him as a tool, Damien was something much greater. Damien was hiding his identity and was waiting for the right time to expose it but suddenly, he felt another leech around his neck when he was told to get married to Claire Adamson, the youngest daughter of the Adamson family.