"Have this not taught you anything?" he asked, looking at Stephen. "You might not have a hundred years. We've been spared wars for a long time before this, but there is no guarantee that it will stay that way," he said. He was, nevertheless, pleased to know that his son could have sex with women. It would ensure the future of the family.
"I love you, and I want nothing more than for you to be happy, but the family line must continue. What you do outside a marriage is your business as long as you're discrete, but a child - a son - is a must." He might not have married in that manner himself, but he would have, had he loved Pansy.
He didn't let his son stray from the topic either, but just looked at him. "That is not an answer to my question," he pointed out. "And there is no reason why you'd drift apart as friends because of his father and me, which means you were more than that. How long have you been involved with him?"