He hesitates a moment too long

Samantha took advantage of John's hesitation and put her hand between his legs, cupping his rapidly hardening cock. "I guess not, you seem very .. tense!"

Catching on rapidly, John reached behind her and pulled her toward him, her chest pressing against him, as she continued to rub his cock. The doors opened in the building lobby, and they stepped out, her finger hooked in his waistband. "I'm ready now, if you want me. In fact I was just fingering myself at the thought of having a man in the building again." She said this to his dick, gently stroking it with one hand, then looked back to his face. He nodded, still unsure how to take the next step.

Samantha knew just what to do, though, breaking their connection and turning away, peeling her leggings down and removing them, providing John a brief glimpse of plump labia between her cheeks as she did so. Without looking back, she leaned over the nearby loveseat, and her hand appeared between her legs, rubbing slowly. John pulled his own pants to his knees, still unsure about being naked in the lobby but eager to take advantage of the opportunity before him. As he approached, she took his cock in her hand and slid it deftly into her hot flesh. Both sighed in unison, and as John began to stroke she said casually, "I haven't had a cock inside me in so long! But please finish inside, I don't have time to go back and clean up."

Sensing the urgency of the situation, John took Sam's hips in his hands and began stroking faster, and quickly approaching climax. His limited experience told him to slow down and prolong the moment, but Sam didn't seem interested in an extended love-making session. Instead, he continued stroking and with a grunt held her body against his as he convulsed inside her.