Brand him (slow burn femdom)

The Succubus punched Tristan in the gut and the sparks leapt from her hand onto his body. They multiplied as the magic spread all around him, the feeling reminiscent of embers sizzling his skin. The Succubus pulled back her hand and Tristan saw blue rings and symbols forming on his abdomen; the rings turned black and he was left with an occult brand depicting a diamond-like sign surrounded by two circles.

“I don’t want you to have any stupid ideas about escaping me,” said the Succubus. “So I gave you a little something to make sure you do as you're told. I can sense where you are and if you don’t listen to my instructions, well..”

The brand turned a scarlet red and Tristan felt his temperature rise like he was going to burn away. The former squire felt so hopelessly trapped. He had escaped Sir Reginald’s estate to be free and now he was more restrained than ever.

“I need you to get me two things,” the Succubus added. “A diamond, one at least the size of my eye and a lock of hair from a recently deflowered virgin. The woman needs to be a virgin when you cut her hair, then break her maidenhead shortly after. Understand?”

He nodded. What else could he do?

“By the way, my name is Mary. Though call me Mistress, or Mistress Mary. Understand all that? You seem like a particularly dull human, truth be told.”

"Yes, Succubus," said Tristan. Her name sounded blasphemous to Tristan so he avoided using it.

The Succubus frown, but exited the room, her body still mostly hidden under her black cloak. Once gone, his leather cuffs opened and Tristan fell to the stone floor, his arms catching his fall. He was still naked but spotted underneath a table full of phallic objects a pile of clothing. There were some pants, a tunic, and a light black cloak that fit him well. Did she make these for me, he wondered, or are they from a former victim of hers?

Tristan went to the spiralling staircase. Upstairs, he could hear liquids bubbling and other signs of life. Hopefully, he would be able to leave the diamond and hair on the first floor of the tower and never have to see the Succubus again. Though the monster said nothing about releasing him after his errand was complete.

He walked to the bottom of the tower and opened the door. It was early in the day and Bucephalus was still standing outside, looking as calm as ever.

Suddenly, Tristan felt a woman’s arm wrap around his neck, pulling his upper body back with inhuman strength. Another arm slipped underneath his tunic and cloak, fingernails running up and down his chest. Magic held his head in place, making it impossible for him to look back. Tristan could feel breasts pushing against his thin clothing as the hand on his chest playfully began touching the skin around his cock.

“One last thing I forgot to emphasize,” Mary whispered into his ear. “You are completely, totally, utterly all mine.”

She vanished.

Tristan looked around for any sign of the Succubus but found none. He wanted to get away from this tower, fast. He mounted Bucephalus and began riding. He was hungry, a criminal and now a Succubus’s thrall. At least he still had the horse.