Zach stared down at the girl, bound and gagged, in front of him. She swung from her bonds, her knees brushing the fur beneath her. His dick stood proud from his flat stomach, bobbing as he moved around the bed. She’d made a small sound in the back of her throat when he’d climbed up onto the bed. Anticipation — either positive or negative — and perhaps even a touch of uncertainty?

He hadn’t realized this set up would have been so erotic, so intoxicating. He felt ready to explode: if she’d been free and had made a grab for his dick, even a single touch would have had him cumming all over her face.

An interesting prospect…

She swayed forward, moaning again. Her gagged mouth came to within an inch of his beading cock. The urge to shove it past her gag was so intense that he leaned closer, until his dick almost brushed her chin.

Perhaps she sensed him so close; perhaps she could feel the heat exuding off his erect dick. She moaned, thrusting her head forward.

Zach barely managed to draw back in time.

“Naughty girl,” he said.

Watching her through the green-tinged darkness of the night-vision goggles made Erin appear so different, so alien. She was so sure of herself in here, so pliant and responsive. Mason had said it would work: that all Erin needed was to be dominated. He apparently did that with Lexi all the time: the sex was how he wanted, when he wanted. And Lexi was only too happy to comply. But thinking about forcing Erin — even though it would probably be mutual — to do anything more than their weekly routine of kissing, undressing, sex-with-the-lights-off had made him feel dirty.

So why did this feel so good?

Zach ran his hands through Erin’s hair. Even that felt different. A small thought in the back of his head flickered to life, but at the same time his dick throbbed once — hard — and he pushed further thoughts from his mind.

“Do you know what I’m going to do to you tonight, my pet?”

Erin squirmed against her bonds, and let out a muffled phrase that sounded like: ‘No, Master.’

God, that made his dick ache to be inside her. She was always taking the lead in the bedroom, getting everything over and done as quickly as possible. They would both cum, so it wasn’t as if she did it to get rid of him. But it was always more like a business transaction than an act of lovemaking.

Tonight would be different.

“No, you don’t,” Zach murmured. “And you won’t know until I’m doing it to you.”

Zach grabbed the shaft of his dick in his hand and touched the tip of it against Erin’s cheek. She recoiled at first, but then leaned toward him as if wanting more. He drew a line from her cheek down to her chin and up the other side, careful not to get any of his precum on her face.

He wanted her pristine.

Zach dropped the whip on the side of the bed and used his fingertips to trace lines down the front of Erin’s body. He grabbed her breasts — just large enough to spill out of his hands — in a rough caress that made her moan and arch into his touch. He squeezed her tits together and crouched, sliding his dick between them.

She gasped and began moving her torso up and down, letting his dick slide between her breasts. Zach grunted, the sound emerging strange and metallic, as he fucked her breasts in the eerie green glow of the night-vision goggles.