The negotiations continue

I know, I've been such a tease. But I've been ... busy.
Here's some more of this story.

It was his turn to shift.
"What are you doing?"
She had unlatched the belt buckle and was now unbuttoning the top of his fly. She could feel how warm his skin was through his shirt, feel the strain of his erection against his pants. She unzipped the fly, watching his face for a reaction. He stared at her. "I asked you what you were doing," he said.
She slid the palm of her hand down underneath the waistband of his briefs, felt the hairs on his lower belly that were slick from him. "I'm not the only one who is wet," she said.
She pushed her finger against the head of his cock.
She knew there were people passing by not 20 feet away, and the thrill of getting caught was driving her on.
He was compliant, but she could sense his hesitancy, too. She pulled her hand out of his pants, put both hands on his hips, and began to push his pants down around his thighs.
"I don't think this is a good idea," he said.
She wasn't listening.