There were still things he wondered, things he wanted to make sure of, but for now, he decided to drop the matter. For now at least. When he'd thought more about it, he might very well bring it up again. Or rather he would. He would not risk his family for anything, but he trusted that Stephen knew his duty.
"Your mother and I might not have such an arrangement, but I certainly know how they work, thank you," he said. "I do not care what you do, as long as there is an heir to carry on the family name. Beyond that you do what makes you happy and keep it like now, discrete."
He frowned. "Do try to stay away from Muggle's though," he added, because while he detested the Dark Lord's rule he hadn't changed his views that wizards were superior to Muggles.
He looked at his son. "We'll need to continue training," he said. "With this information it's even more important. Are you ready to continue or do you need to rest?"