She felt his fingers tug at the zipper on her costume, dragging it down past the small of her back. The hesitation and excitement in his body language was endearing to her, especially because it let her know that she wasn't the only excited, nervous one in the room.
As he kissed her again, she unfastened her utility belt and let it drop to the floor behind her. Then she gently pushed him into a sitting position on his bed. She moved around the bed as she removed the rest of her costume, to reduce the likelihood that he'd open his eyes.
A minute or so later, the mattress sank with her weight as she kneeled onto the bed, moving behind him. Wrapping her arms around him again, she began kissing his neck and pressing her body against his. Through his clothing, he could feel that she hadn't left any clothing on.