Diana is Prepared

Diana stiffed a moan as Lisa stopped talking, the story had been weird to listen to. The idea of Lisa having fantasies about one of her old boyfriends was bizarre, but the way she related it was so arousing. Maybe it was because of the feel of suction on her clit, driving her into dizzy-headed lust, but she could not help but reflect on some of her own old fantasies, the ones she had enjoyed when she first started to date.

"That's probably you ready, sis." Lisa said, the buzz under her dress continuing on as she walked. It was at a low but constant rate, and Lisa's face was now flushed with arousal. Still, she did her best to ignore it, checking towards the chat for her next orders. Diana watched her, watched her eyes widen in surprise, concern briefly flashing before them.

"That is...not what I expected." She admitted, looking back to Diana. "Are you guys sure you wanna do this? It's kind of harsh."

Diana frowned at that, wondering what she meant. Just what did the chat have planned for her that could maker her sister concerned? She felt a churning in her gut, but pushed it aside.

"You sure?" Lisa repeated. "All right, all right..."

She looked back to Diana, and this time, Diana saw sympathy in her younger sister's face.

"Sorry, Di." She said. "I guess they want to be really harsh with you this time."

Diana tingled at that, she felt both excited and wary. What were they going to do to her? What did they have planned? She learned at least a little bit of that a moment later as Lisa walked back towards her. She reached for the bag she had fetched before, and pulled out a small length of string. With her other hand, she moved towards the machine still tied to Diana's clit. With the touch of a button, it was turned off, the infernal sense of suction died, and Diana breathed a sigh of relief. Carefully, Lisa lifted up the glass vessel, revealing Diana's clit to her for the first time since the procedure started. Instantly, she felt the increased sensitivity that her sister had promised. The feeling of the cold air brushing against her exposed bud was intense. More than that however, her clitoris had swollen to several times its size, the rush of blood making it engorged. It was bigger than she had ever seen before, and it tingled and prickled just from the feeling of being released. The hood had fallen back to expose the bud beneath, and it throbbed with the attention of the world being directed at it.

Oh god, she realised. Everyone was seeing this. She had never looked so utterly lewd in her life. Here she sat with her arms tied, and her legs spread. Her clit engorged to the point where it poked out obviously.

But it wasn't over yet. It wasn't even nearly done. Lisa gave her a look of apology, and then reached out, gently running the string around the base of the clit.

"Oh." Diana said. "Oh god."

The feeling of the rope rubbing against her skin made her writhe. It encircled her clit, and then bound it, gently at first, but with growing tightness as Lisa did up a knot. Diana hissed as she felt it draw tight about her lower self, her legs flexed, her arms tensed, pulling against their bonds.

After a moment, Lisa drew back, examining her work. Diana realised what had been done. With the rope tied about the base of the clit, the blood flow that had engorged it could not easily be reversed. There was still some, obviously, but not so much as to allow it to shrink quickly back to normal size and sensitivity.

Next, Lisa reached into the bag again.