Inheritance (The Lost Bride Trilogy, #1)

by Nora Roberts

“That’s cheerful.” She turned to Connor, Collin’s twin, who’d inherited the manor at his brother’s death. And by all accounts had lived a happy life, from childhood, through his own marriage—with a big ugly murder and suicide in there. He, too, had expanded the manor, and the business, while producing five children.

huh? isn't her dad his twin?