Taking a small step back, but still pressing hard enough against her that she could not move away from him, he bent his legs slightly and slid both his hands up her legs, starting at her knees. The skirt of her dress came up over his wrists as he continued to slide them up all the way to her delicious ass. What was this? A flimsy strip of lace running up her ass, connected to more flimsy strips of lace around her hips. Ah. A thong. He smiled to himself again. No need even to cut these of her; the back strap could simply be pulled out of his way. But first...
Flipping the skirt all the way up and over, covering her bound hands with it, he grabbed the sides of her thong panties, and wriggled them upwards, forcing the material against and into her pussy. She tried to buck at this, but movement was all but impossible in the position she was in. He played with the panties, pulling first to one side, then to the other, always pulling upwards at the same time, knowing the lace in the crotch was being rubbed back and forth across her clit as he did so. She moaned a tiny sound from behind the gag and tried to buck again. He leaned close to her ear, not letting go of her panties, and whispered, "you need to shut the fuck up. You don't want anyone hearing you, right? The quieter you are, the better for both of us. Understand?" She didn't respond. He jerked the panties up again, much harder this time, and she jumped as the fabric bit into her pussy. "Understand?" he repeated more sternly, and she nodded her head as well as she could in her restricted position. "There is no point in struggling," he told her. "As you can see, I am in charge now, and it is about to become very clear to you what that means." She squeezed her eyes shut tighter, unable to say anything.
Forcing her legs apart with his own, he unzipped his pants and freed his aching cock. Oh, Jesus, this was going to be so fucking good. He rubbed the tip of his cock over her ass, teasing himself with the sensation. He wanted her so much he thought his head might explode if he didn't take her soon, but he still needed one more thing. Without releasing his hold on her, he bent sideways to his briefcase again, just able to reach it and drag it closer to him with one long finger. Then he felt inside for the small bottle of specialty "high-tingle" lubricant, the one he'd chosen especially for this visit to her office. Flipping the lid open, he squirted the contents liberally all over his cock, watching it drip on her lower back and ass, rubbing against her skin some more to make sure his entire cock was coated and slippery. He could feel her still trembling, and he was really getting off on this level of power he had over her. He pulled the lace thong out of her pussy and moved it to one side, leaving her wide open for him.
Not able to resist any longer, he forced her legs wider apart with his knees, and after bending his legs to position his cock up under her pussy, he began to slide it inside her. The lubricant made this deliciously smooth, but she was so unbelievably tight it that he still had to move slowly. He didn't want to rip her open, just make sure she knew that he was in charge. With his cock buried in her pussy, he thought she might be starting to understand that, now. As he thrust into her a little harder, he heard another tiny moan from her but could tell it wasn't a sound of pain, this time. Holy shit - she was fucking getting off on this, too. That thought made him dizzy with lust, realizing that his desperate urges to fuck her were not one-sided after all. He pushed his rigid cock all the way inside her, pulling hard on her hips to bring the two of them tightly together. From her trapped position she couldn't move much, but he felt her desperate writhing motions beneath him, as she tried to take him in deeper. Christ, this was unreal. He was practically raping her, and she was trying to pull him inside her even more?
Oh, God, he couldn't hold out against this for long. He had wanted to make her take it for a long time, to punish her, to show her who was in control, but now he just wanted the exquisite release he'd been craving for so long. He increased his speed as he slid his cock in and out of her slick pussy, watching her beneath him, pinned to her own desk by him as he fucked her. The intensity increased until he was slamming into her, again and again, feeling his balls slap against her, the firmness of the wooden desk providing solid resistance against his thrusting motions, helping him go into her deeper and deeper. He was going to come so hard he didn't know if he could stay quiet, but the thought of her employees in their nearby offices made him clamp his lips tightly together. This was too fucking good to spoil with an ending like getting caught. With an explosion of overwhelming pleasure, he ejaculated into her, his hot juices spurting up inside her, over and over. He didn't think he'd ever stop coming - this was so fucking hot. Finally his thrusting slowed, and he tried to catch his breath quietly. It was agonizing to stay quiet, but he knew it was necessary.
Now that his adrenaline-fueled lust was sated, he felt a little nervous. Had he gone too far with her? Leaning down over her again, he pulled the elastic strap of the ball gag up and forward, over her face, gently removing the ball from her mouth. She worked her jaw around, now that it was released from the pressure of being forced open for so long, but she didn't say anything. OK, that was a good sign. Next he moved to her wrists, and using the blunt-tip bandage scissors he'd placed at the end of the desk he'd just fucked her on, he carefully slit through the bondage tape and freed her wrists. She sighed softly, letting her arms finally separate from behind her. He lay forward, almost completely on top of her, his cock still pulsing inside her. His anger spent, he raised his hands to stroke her hair and the side of her face, then gave a start as she opened her mouth and sucked three of his fingers inside it. He looked down at her, surprised, and saw that around her mouth full of his fingers, she was smiling.