It was difficult to leave the Death Eaters once you started, Darren knew that. What Voldemort hated more than even muggles, were traitors, If you left the Death Eaters you would have a very good chance of being murdered by them later. Darren himself had been hunted for a year almost continuesly, if it hadn;t been for a combination of luck, their stupidity and his skill he would probably have been dead.
Watching Sue turn absentmindedly to him, he suddenly had a very good idea. Her mind seemed to be pretty unguarded now anyways, so he siezed his chance. He glared back at her, seeing into her memories what she was currently thinking. Suddenly she broke eye contact, which also broke the spell.
"N-Nothing," Darren said, taken aback at the memories he had just seen. He had not expected to see that. In his mind Sue was a twisted lunatic who just enjoyed killing people, now he realized it might be rather different. Recovering, he decided to change the subject quickly so she didn't realize what he had just done.
"So did you know, yesterday at the libary, I convinced Zoe to leave the Death Eaters?" he said casually.