Dawn's eyes actually drifted low, back up, and low again, before the situation caught up with her and her usually instincts kicked in. Which were followed by the instincts that came from the voice in her head, swinging her off the bed and into a defensive position, despite nakedness.
"D--Dawn," she said, when she could talk again. "I... did we? Because I don't remember and I think I'd have had to be really drunk not to and..."