Yaz was trembling as the Master led her into the chamber. They passed a screen Her heart raced at the sight of the Doctor, bound and gagged, seated on a wooden chair. The Master's eyes glinted with amusement as he watched Yaz's reaction.

"You'll do as I say, or the Doctor dies," he said, his voice low and menacing.

Yaz felt a cold sweat break out on her forehead. She couldn't let the Doctor die. She had to do what the Master said. The Master's eyes trailed over Yaz's body, taking in her curves and the way her chest rose and fell with each deep breath she took.

"What do you want me to do?" she asked, her voice barely above a whisper.
The Master grinned, showing his perfect white teeth. "I want you to strip for me and show me what you've got."

Yaz's heart sank. "Take it off," he commanded, his voice deep and commanding.

Yaz hesitated for a moment, but the look in the Master's eyes told her that she had no choice. She slowly began to pull up her shirt, her fingers trembling with fear. As she pulled the shirt off, she revealed her lacy black bra, and the Master's eyes narrowed with desire.

"Keep going," he growled, his hand reaching down to adjust his growing erection.

Yaz's heart raced as she undid the zipper on her pants and let them fall to the floor. She stepped out of them, now standing in front of the Master in just her bra and panties. He motioned for her to come closer, and she hesitantly took a step forward.

"Dance for me," he commanded, his voice low and seductive.

Yaz's heart pounded in her chest as she began to sway her hips to an unheard rhythm. She closed her eyes and let the music take over, her body moving in time with the beat. The Master watched her, his eyes never leaving her body as she moved.

She continued to dance, her body moving with grace and sensuality. She felt the Master's eyes on her, and it made her feel desired and wanted. He reached out and grabbed her hips, pulling her closer to him.

He reached out and pulled her onto his lap, his hands exploring her body. She felt his hardness against her thigh, and it made her feel wet.

"You're a beautiful woman, Yaz," he said, his voice low and seductive. "I'm going to enjoy having you."

Yaz felt a shiver run down her spine. She knew what the Master wanted, and she was ready to give it to him.

Yaz gasped as she felt the Master's hands on her body. He ran them over her curves, his touch sending shivers down her spine. He pulled her onto his lap, his hands groping her breasts through her bra. She let out a soft moan as he pinched her nipples, her body responding to his touch despite her fear.

The Master's hand moved down to Yaz's panties, and he slipped his fingers inside. She gasped as he began to rub her clit, her body responding eagerly to his touch. She rocked her hips against his hand, her moans growing louder.

"Enough," the Master stated, pulling his hand away.

Yaz looked at him, confused. He stood up, pulling her with him. He pushed her down to her knees, his cock at eye level.

"Suck," he commanded, his voice rough.

Yaz hesitated for a moment, but the look in the Master's eyes told her that she had no choice. She leaned forward and took him in her mouth, her lips wrapping around his thick cock. She sucked him deep, her tongue swirling around the head of his cock.

The Master groaned, his hands tangled in Yaz's hair as she sucked him. She moved her head back and forth, taking him deeper and deeper. He thrust his hips, fucking her mouth as she sucked him.

But the Master had other plans. He sat back down, his eyes never leaving Yaz. "Come here, my dear," he said breathlessly, patting his lap. "I have a task for you."

Yaz hesitated for a moment, but she knew she had no choice. Her legs shook as she straddled his waist. He leaned back in the chair, a smirk on his face as he watched her. "That's it," he said, his voice low and seductive. "Ride me."

Yaz closed her eyes, her mind racing as she tried to think of a way out of this situation. But she couldn't deny the feeling of his hard dick pressing against her panties. She bit her lip as she began to grind against him, her body responding to his touch despite her best efforts to resist.

The Master's hands roamed over her body, cupping her breasts and teasing her nipples through the fabric of her bra. Yaz gasped as he slid a hand down her stomach and slipped it into her panties. "You're so wet," he said, his fingers exploring her folds. "You want me, don't you?"

Yaz couldn't deny it any longer. She nodded, her body moving of its own accord as she rode him harder and faster. The Master's fingers worked their magic, sending waves of pleasure coursing through her body. She threw her head back, her moans filling the room as she reached her peak.

The Master chuckled as he felt her body tremble with pleasure. "Good girl," he said, his voice thick with desire. She heard a rip. He had torn the fabric of her underwear open. He wrapped his arms around her, holding her close as he thrust up into her. Yaz gasped as she felt him fill her, her body moving in time with his as they both chased their release.

The Master began to move, his hips thrusting upwards as he fucked Yaz. She felt him deep inside her, and it made her moan. His hands gripped the black curls of her hair and pulled on them cruelly, making her head fall back.

"You like that?" he asked playfully.

"Yes," she said, her voice breathless. "Fuck me harder."

The Master increased his pace, his hips thrusting upwards as he fucked Yaz. She felt him deep inside her, and it made her moan.

"I'm going to come," she said, her voice breathless.

"Yes. Come for me, Yaz," the Master said, his voice low and seductive.

Yaz felt her orgasm build, her body tensing as she came. She felt the Master's cock twitch inside her, and she knew he was coming too. The Master's thrusts became more urgent, his body tensing as he reached his climax. Yaz felt him fill her, the sensation leaving her tingling.

They both collapsed against each other, their bodies slick with sweat as they caught their breath.
The Master looked up at Yaz, a smirk on his face. "You're quite the ride, Yaz," he taunted. She scowled and he laughed. .But I'm afraid our time is up. The Doctor and I have a lot to discuss."
Yaz looked at him, her eyes filled with anger and disgust. But she knew there was nothing she could do. She got off of him, her body trembling as she picked up her clothes and got dressed.

The Master grinned, letting out that sinister laugh. "thank you, Yaz. You've been a very good girl."

As she walked away, the Master called after her. "Don't worry, my dear. I'm sure we'll meet again."

Yaz didn't turn around, but she couldn't deny the feeling of dread that settled in her stomach. She knew that the Master was right. They would meet again. And she knew that she would never be able to resist him.

The Master watched her leave, a satisfied smirk on his face. He had won this round, but he knew that the game was far from over. He would continue to chase the Doctor, and he would continue to use Yaz as a pawn in his twisted games.

But for now, he would enjoy the memory of their encounter. He would remember the way Yaz's body moved against his, the way she gasped and moaned as he brought her to climax. He would remember the feeling of her tight entrance around him as they both reached their peak. He laughed. His greatest victory yet.