It was the strangest weekend Mia had ever had. Yet, she felt that she wanted to know more, learn about what her friend enjoyed so much, but most of all, she wanted to satisfy the urge that had appeared so suddenly.
Claire sat on a wooden chair in her bedroom, still dressed in only her panties and the buttoned shirt. Mia sat across from her on the bed. Two drawers of the nightstand were opened, revealing several lengths of rope, handcuffs, different gags and ultimately vibrators and other toys. Both girls were flushed and again silent. Finally, Claire rose her voice.
"You... you really want to see? It could be very awkward."
Mia nodded. She had made up her mind. It would not let her go until she knew more and had more experience. "it doesn't get more awkward than this, Claire. I want you to show me what you do."
"Alright, fine..." Claire took a deep breath. She wasn't sure if she wanted this. She stood up and took a pair of handcuffs from the drawers, pulling the chair beside the nightstand and tying the handcuffs to it's back with a cord, making sure it couldn't just be pulled off by force. Sitting down on the chair she took two lengths of rope and started tying her ankles tightly to the front chair legs. She hesitated a bit before taking more rope and continued by tying her legs to the chair legs as well. While she worked on her own bonds, she actually managed to concentrate and blended out Mia's presence, which was why she didn't think twice about unbuttoning her shirt, revealing her bare breasts. Yet modest in size, they were firm and well-rounded, adding to the beauty of her athletic body.
Mia blushed at the sight of Claire's almost uncovered body, once again calling forth the arousing feeling between her legs.
Claire reached into the drawers once more, pulling out several pieces of black cloth. Deciding she would not use a cleave gag today, she put all of them back but one which she put onto her lap for later use. She took a red ball gag, slightly larger than the one she used on Mia before, opened her mouth and pushed it behind her teeth before buckling it behind her head. Next, she reached for what would bring her the most pleasure during her session: Two capsule vibrators with a small remote control. Using adhesive tape, she attached them to her already hardened nipples, while putting the remotes into her lap before taking the cloth into her hands, folding it and tying it over her eyes as a blindfold. She took one last breath before turning on the vibrators on medium, reaching behind her back with her hands, opening the handcuffs. This would be it. She thought everything through once more while closing one part of the cuffs around her right wrist. Had she forgotten anything? The key was in her hand, as always. It made the situation less exciting, but she never dared to rely on a mechanism or some other preparation and always made sure she kept the key with her. Something crossed her mind. There WAS something she forgot. Silky soft hands took the key from her and fastened the cuff around her left ankle.
"This really does look exciting.", Mia's voice said behind her, "But you're not really helpless with the key, right? How about I hold onto this for you?"
Having her hands empty, Claire started to get nervous. She moved her arms and legs, trying the bonds, huffing into the gag. She had to admit, this really was more exciting. And with Mia being there, she was still safe, right?
Mia had sat down on the bed once more, watching her friend turning her head and struggling slightly. There it was again, the arousing feeling, but it wasn't quite the same. She hesitated, looking at the remotes in Claire's lap, at the opened drawers, at her friend's exposed chest. The vibrators were doing their job, humming away, making Claire's nipples harden even more and making the girl make muffled noises behind her gag. Carefully, Mia took both remotes and looked at her friends partially hidden face.
"Sorry, Claire, but I really need to..." She pushed the buttons, making the vibrators hum louder. Claire winced at the sudden increase in force on her nipples and moaned, pulling on the handcuffs, making them rattle. Suddenly, panic rushed over her from the loss of control and she tried to call out to her friend, which only resulted in more muffling.
Mia too was suddenly grabbed by panic as she realized what she was doing. Standing up, she quickly removed the gag from Claire's mouth.
"Ohmygosh, Claire, I'm so sorry! I shouldn't have-- I mean, are you okay!?"
Claire breathed heavily, the vibrators still working away, since Mia hadn't turned them off. However, hearing the worried voice of her friend already calmed her down a bit. 'I'm save.', she remembered, trying to reflect on the situation.
"Don't just... do this so suddenly. w-warn me first.", she stuttered, doing her best to sound scolding.
"I'm sorry, I best turn these off then--"
"No, wait!" Claire blushed. "P-put away the remotes. I want you to-- Aaah!" She moaned loudly. "w-wait... Leave them on and..." She huffed, partially stalling for time, thinking about what she was gonna say. But the urge was greater than her sanity.
"C-could she put one more... one more on..." Mia was fast. It was like she was reading Claire's mind. She surprised herself as she didn't even hesitate to take one more vibrator, turning it on and attaching it to Claire's wet panties. The athletic girl pulled on her bindings, arched her back and moaned loudly, throwing back her head. The sound and sight aroused Mia to the point of where she couldn't take it anymore. Setting all the remotes aside, she pinched her left nipple while reaching into her own panties with her right hand, biting her lip. But that wasn't enough, it just didn't cut it! She reached into the drawer, but there were only three small vibrators and all of the, were in use. Only one solution came to mind. She sat down on Claire's lap, having the vibrator in her crotch stimulate hers as well.
Claire felt Mia's breasts press onto her own, sharing all three vibrators with her. Her crushes arms were laid around her neck, she could hear her moaning up close, could feel her breath on her skin.

Both didn't know how long the session had been as they found themselves reaching their limits while their lips touched, silencing both their moans.