Try to protect them both

Duncan's eyes grew wide as he saw the smoky hand reach toward them. Seeing that Terrice was frozen with fear, he wrapped his arms around her and lifted her as he stood. His rapidly-softening penis still embedded deep in her ass, he swung her around to the side, in an attempt to move away from the apparition's reach.

Terrice finally found the ability to move and reached out to grip the edge of the table. Detaching her ass from Duncan, she turned around to get a look at the ominous hand. Seeing it coming ever closer, she panicked and clamored onto the desk, accidentally kicking Duncan in the process.

The prince didn't see her foot coming. His head was turned, looking at the mirror from over his shoulder. When Terrice's foot made contact with him, he stumbled, tried to catch himself, but ended up taking two steps backward before falling into the mirror itself.

Duncan braced himself for the crash and the lacerations from the shattered glass, but nothing like that happened. Instead, he felt himself falling the room around him suddenly grew darker. After falling for longer than it should have taken to hit the ground, his naked body finally made impact on a hard, cold surface.

He looked up and saw what at first appeared to be an oval-shaped window. He then realized he was looking through the mirror into the library. There, just about ten feet above the floor, he could see into the library and saw Terrice, standing on the table, looking with horror in his direction. Her hands tried futilely to cover her nakedness, and her mouth was open in what appeared to be an attempt to yell, but her voice did not reach Duncan's ears.

"Terrice!" he called out, hearing his voice echoing strangely in his new surroundings. "Throw me a rope so I can get out of here! Or hurry up and get MacTavish!"

"She can't hear you, silly boy," said a voice from behind him. "Or see you, for that matter. You're all mine, for the time being."

Duncan quickly rose to his feet and turned to see who spoke. In the low light of his surroundings, he could barely make out the stone walls of what looked to be a windowless prison cell. In one corner was a pulsating cloud of black smoke that appeared to be the source of the mysterious hand that reached through the mirror.

"What are you?" Duncan demanded, trying his best to sound brave.

"I'm whatever you fancy," came the response. Immediately the cloud swirled and took the shape of a fierce, black dragon. Duncan backed up against the wall, horrified as the creature approached him.

"Of course," said the dragon, stopping its advance. "You are human, aren't you? It's been so long.... Let me see if I can still remember...."

The dragon's face took on a look of concentration, and then it evaporated into the smoky cloud once again. The cloud swirled and shifted before settling into the shape of a woman. Naked, except for a black scarf around her neck, the woman stepped toward Duncan, holding her breasts seductively with both hands.

"Tell me... Did I get the shape right? Is this one more to your liking?"

Despite his fear and confusion, Duncan had to admit that the strange creature did a fantastic job. He looked at her long, black hair, shapely body, and eyes that were so captivating that they almost prevented him from ogling the rest of her beautiful form.

"What are you?" Duncan asked again.

"A prisoner," she answered, closing the distance between them. As Duncan pressed his body against the cold, stone wall, the woman stood directly in front of him, one hand against the wall, leaning toward him. Duncan felt her breasts against his chest. She may have been a formless cloud a moment ago, but she felt quite real at the moment.

"Yes, a prisoner," she repeated. "And now, you are, too. The journey through the mirror is a one-way trip."

Duncan looked quickly toward the opening through which he came. He saw Terrice standing there, reaching out with her hands, and apparently unable to pass through like he did.

"I don't understand," said the prince.

The woman leaned even closer against Duncan. She brought one knee up, seductively against his side and ran one of her hands over his shoulders. Duncan could feel her pelvis come in contact with his, and he felt his cock twitch in response.

"Mmmmm...." said the woman, noticing Duncan's body's response. "I'm guessing I chose an appropriately-pleasing form after all."

"Will someone just explain what the hell is going on here?" said the prince, in exasperation, but making no effort to step away from the naked beauty.

"What happened, dear boy, is that your little tryst was not only delightful for me to watch, but it was just powerful enough to weaken the door to my prison. I had hoped I would be able to escape, but all I could do was reach out and catch a mere scent of freedom. I should be furious that I was denied an escape, but things have a way of working out for the best. You managed to blunder your way in here with me, so now I will have some company -- for a while anyway. You humans don't live very long, if I remember right. I might as well make hay while the sun shines."

With that, she reached between Duncan's legs and took hold of his balls as her lips found his. She kissed Duncan deeply, pressing her tongue against his lips, seeking entrance.

Duncan's cock sprang fully to life at her touch. Despite the powerful orgasm in Terrice's ass a short time ago, there was something about the seductive creature that had him fully erect and desirous to fuck.

At the same time, he felt he should resist. Something was definitely not right about this. By her own admission, she was a prisoner, so she must be evil.