Rich was following the directions Michelle had given him on a small scrap of paper, He was already on the 4th floor of the library, now he was moving aisle to aisle looking for "a secluded section, dark with no windows and no seating area, amongst some huge dusty old texts that no one ever signed out, and adjacent to a disused conference room" as described by the paper in his hands.
Michelle was definitely right, he hadn't seen a soul on this floor yet, so this probably was the most unused portion of the building, and hell she worked there so she must know what goes on where.
He turned right, following an aisle down, the towering shelves of books were almost oppressing with the silence. But he was sure would provide good cover and stop them from being caught and costing his girlfriend her job.
Turning down two more aisles and there she was, beside a windowed door into a dark room marked "conference". He had to smirk; she was pretending to put away books from a cart onto an already stuffed shelf.
He crept up behind her, whispered by her ear, "Ssshhhh," and held up an unassuming brown paper bag. "I've brought you lunch." Kissing her ear and waiting for her to open the bag.
Michelle shivered at the soft hush of his voice and took the proffered bag. Rich's hands were already on her, he was as excited as she was at the thrill of this "encounter". She quickly unfolded the top of the bag careful not to make too much noise with the crinkling of the paper, her eyes widening at the shape of the gag nestled in its dark confines.
Rich whispered again, "Quiet in the library..." and grinned as she took it out of the bag. He took it from her and fitted the black rubber ball of it into her mouth, drawing the straps back across and around her face gently to secure the buckles.
Michelle gasped and whimpered in total anticipation and trepidation of this act, almost thinking herself crazy as it was her idea, but she could no longer protest, and she knew that the gag itself was as much a serious precaution as much as a kink.