"This isn't going to ruin us," Lucius said, losing his patience. He might be willing to grovel a little, but he was entitled to do whatever he wanted. It was his right as a man and a Malfoy. "If killing people didn't ruing us, a child isn't going to ruin us."
He stopped trying to touch her. He'd dealt with Bellatrix often enough to recognise these moods and as much as he worried about telling her, he will not die over this.
"You want to know my solution? We keep our heads high as we present him to the world. No hiding, no lies, nothing that's going to blow up in our face, nothing that's going to give Nott power over us," he said. "There's very little people can do or say when we're already admitting it." Sure, people would talk for a few weeks, but then they'd find something else to worry about. "I'll do a mea culpa, it was a hard time in our lives, I was already under the Imperius, I was forced to do it because she needed to be punished for what the Dark Lord saw as a sin. I never saw her again, I did not know. Now that we know, we're being caring and loving parents, taking care of him and welcoming him into our home. There, that's my solution."