"No, not really!" Diana exclaimed, angrily. "This stupid prat here is pretending NOT TO BE ONE OF THE DEATH EATERS! When I already KNOW what he is-- one of them!" And with that last remark, she burst into tears -- of rage, rather than of sorrow. "I... don't want him in this flat! Not if he's interested in 'the goods' here! Damned if I'm having sex with my OWN BROTHER!"
She then gave her brother a hard shove, which was enough to make him topple back into -- or against, rather -- James -- not that he resisted much, apparently content to fall backwards...!