"Entirely possible," Nathaniel confirmed mildly, watching the claws come out. "It's also possible for two to possess the same mutation without being related - but usually that kind of disparity is seen in only the rarest of mutations. Telepathy, telekinesis, heightened senses, increased strength and related mental and physical mutations."
His head tilted to one side in consideration, continuing to speak as though Lorna were some painting he was critiquing, "She looks nothing like the old man in question, though its possible she could be his granddaughter or a niece. Direct relation would surprise me."