Everything would be easier if he could just tie her up. Lock her away and keep her safe. Well... from everyone except him.
But that's not how love works.
David chose Lianna over his hate. Every part of her. Love of his life. Heiress to a dangerous crime family. Prior focus of all his rage and obsession, and current focus of his... everything.
Her family is the only thing standing in their way. But family isn't everything, no matter what they say. She may share their blood, but those can be fragile ties when put to the test. In the end, it's who we choose that matters.