The tendrils buried in and against the girl complied with her request. The thicker began to slowly slide back and forth as it twisted one way, then the other. The thinner flicked faster and pressed harder at Severity's clit in time with the thrusts.
"Tell me, girl, do you enjoy being helpless like this?"

"Yes, yes I do," she replied, panting slightly, in time with Steel's thrusts.

The shaft began to pound faster into the girl's depths as a series of small bumps appeared on its surface to press along her inner walls. The flicking tendril stopped its motions and reformed itself into a small sucker, which latched hard onto the tender nub and pulled deeply at it.
"That's good, Severity. If you scream nicely the next time you cum, I might give you a little treat."

She relaxed a bit. "Oh, thank you..." she said softly, shutting her eyes.

Her words came in pairs. "You have." The tendril slammed hard into Severity, forcing her off the ground. "To keep." As she was still held slightly aloft, the suction on her clit strengthened almost impossibly. "Begging!"

She gasped, as she was lifted. "Oh, please, Mistress Steel, I'm so sorry, please, keep fucking me, and make me cum!" she begged, her eyes wide.

Deep, echoing laughter filled the chamber as the shaft began pounding mercilessly into the girl's body, shoving it up off the ground with each stroke.
"Mistress Steel? I like the ring of that. You're definitely learning where you belong now, slut."

She moaned softly. "Just a bit more- please, don't stop..." She came, screaming that she was such a whore and she loved it.

As the last waves of Severity's release washed over her, the length slowly drew free of her and hung above her wrapped form. Carefully, it reached out to her lips.
"Show me what a good whore you are and suck it clean."

She started sucking hungrily, her eyes darting occasionally up at Steel.

The shaft pressed softly in and out of her lips as the gray woman returned the glances with a steady gaze.
"Now what is that expression, girl?"

"Mistress Steel?" she suggested around the tendril filling her mouth.

The tendril, clear now of Severity's juices, pulled back and wiped itself off along the bindings over her neck.
"No, no, I meant those looks you were casting up at me."

"I'm sort of worried," she admitted quietly. "I don't know why...'

"Well, I'm not currently reading your mind, but I'd care to guess it's because you're helpless on the floor being insulted by someone far stronger than you who seems to believe you need to be verbally and sexually abused. It's either that or your subconscious successfully predicted those." Her hand stretched out and pointed towards the furnace. A small swarm of smaller mechanical spiders were clambering across the floor towards the bound student.