As far as Malcolm's concerned, he's not going anywhere. They would have to drag him away from her.

"Yeah." He reaches for the cuffs and locks himself into them. "Really romantic, I know."

Part of him can't believe they're trying this, but part of him actually has a good feeling about it. He'll probably still have a nightmare, probably still wake up, but maybe he won't try to hurt her. Or if he does, she'll be able to stop him. Malcolm just hates that she has to at all.