Nothing

John watched Sandy intently, seeing what, if anything, would happen. Suddenly, Sandy started panting heavily. She leaned her head back, closed her eyes, and placed the palm of her hand on her collarbone.

"Oh, John, I feel ... I feel ..."

"Yes?" Jack's interest was definitely not detached at the moment.

"I feel ..." Sandy started laughing loudly, and John realized he had been had. "I really feel that we need to get back to work."

Feeling somewhat disgruntled, John put the book back where he found it and went back to his research, trying to ignore the occasional giggle coming from Sandy.