Leia blinks at him. The way he's waiting for an explanation, not throwing in his own opinions, reminds her of nothing so strongly as the first time they'd kissed. Making himself as likable--oh, hell, as lovable--as he can possibly be, despite all his flaws, and waiting to shoot down every objection she can come up with.

"I can't ask you to stay. Not knowing..." She gestures vaguely, sweeping the thought of Vader away from them both. "This. Not after what he did to you."

And her, and Luke, and the rest of the galaxy. Darth Vader kept himself busy over the years.