"She is insane!" He looked at Remus like he'd lost his mind now. "I don't care if you say it or not, because it's the truth. I don't let sentimentality affect my judgement. She is insane, and I've disowned her because of it. It doesn't matter that I love her dearly. I will not make decision based on what I felt for her. That's just stupid and suicidal."
Regulus rolled his eyes. "I don't make snap judgements, but I'm willing to make judgements as opposed to waiting around,looking for non-existent reasons. There is one: he's a righteous, self-serving, arrogant idiot. That's the fucking reason, and maybe you should stop going crazy and just accept it. And the cunt is behaving like that because she's bloody bonkers. Those are reasons."
The last part stopped him from stomping off, although it really would make things easier. He really wasn't in the mood to play games anymore. "I was talking to Severus about the polyjuice. I was explaining to him that I would not cheat on you just to have the heir. I was being called an insane masochist for being willing to get pregnant and do it more than once. I was told that I'm a naive Gryffindor for wanting to have a family with you. I was thinking just how lucky I was to have you. I was doing all of that while thinking how great tonight was going to be. I was flirting because I don't want this to become boring. I was able to do all of the above at the same time, because I can do more than one thing at a time. Now, if we're done, I'd like to go to sleep."