Dante was her older brother.
He had always protected her from their mother, who wanted her to become the perfect daughter. Quiet, obedient. Nothing more than a doll she could control however she pleased.
That was never going to happen.
Ivanna would never marry a man because her mother ordered her to.
Or because her grandfather did.
Though, to be fair, Damon had never cared much about arranging her marriage. To him, Dante was the heir to the Montgomery dynasty. She was simply his younge