She rests a hand on his arm and gives him a little squeeze.

'It's not like you have a monopoly on nightmares, love.'

And if he did wake up in a cold sweat, she'd still be waking up with him and trying to comfort him.

'Tell you what. Let's just try this,' she indicates the current arrangement, her on top of the covers, him beneath. 'And if you want to get up and pace, or watch tv, or go out for a smoke, then feel free. Don't worry about waking me.'