"I... I don't know. I mean... how long have you...?"
"Quite a while." Jane stepped behind her sister who sat on the stool in the hallway. "But you'll understand that I don't talk openly about it."
"But with whom?" Mia tried to look over her shoulder but Jane softly forced her to face forward again.
"You know that boarding school I attended a few years ago? My roommates brought me into it. We still have sessions occasionally."
Mia winced as she felt Jane's cold hand near her private parts but didn't complain. She knew what she was doing. Apparently.
"So... are you always... dominant?" She nearly whispered the last word. Her face was red and she looked down at the floor. Hearing her sister talk about bondage like a normal hobby was a very strange turn of events. Jane put her arms around Mia and pulled her into a hug from behind.
"I hardly ever get the chance to be.", she answered with a grin, "Now say 'aaahh'."
Claire hadn't moved much. Not that she could. Every little movement strained her muscles or pulled on the crotch rope. It was exciting. Until just a little while ago all she could do was half-baked self-bondage with handcuffs she could open anytime. But this was true helplessness. She only longed for a toy between her thighs and a tight gag to make things perfect. Her heart was beating faster, she felt her skin tingle and her nipples erect, the more she struggled. She would have forgotten about the other girls if Jane hadn't opened the door and called out to her.
"I'm back, honey. I brought you someone to play with."
Claire's eyes widened slightly. Jane was holding a leash, the other end attached to a collar Mia was wearing. The blonde was completely naked, save for her panties. Her wrists were connected in front with a pair of handcuffs and her mouth was filled by the pink ballgag Claire had used on her a week before. Small vibrators were attached to her nipples and a third one was close to her crotch, judging by the fluid between her legs. Jane led her second victim to the tied athlete and put her hands on her sister's bare shoulders, softly pushing her down, making her sit on one of Claire's folded legs.
"You kids have fun now.", the mistress said, having Mia raise her arms to put them around her friend, before feeding the leash through under Claire's armpit, tying it to the handcuffs, making it impossible for Mia to distance herself from Claire. "I'll be back in a jiffy." Leaning forward, she gave both girls a kiss on the cheek and headed for the door.
Claire stared directly into Mia's eyes. Despite not being gagged, she didn't manage to say a word. She felt the vibrators on Mia on herself but more importantly, she felt Mia's skin on hers. Her warm skin. Claire lost track of her heartbeat at this point. She lost track of everything. There was just a mass of feelings, each more captivating than the very ropes on her body. Both of them moaned and huffed occasionally, but none spoke.
Claire wasn't sure how long they had already been left alone. It might have been five minutes or five hours. All she knew was that she noticed more details about Mia than ever before. Her voice got a bit high pitched every now and then, about every three moans. Her eyes were smiling at her and when she looked closely, they were a tad darker than she remembered. Maybe she never payed all that much attention to her eyes. And her lips were soft. Saliva was dripping down her lower lip. With the rubber ball in her mouth, Mia wasn't able to swallow properly. Leaning forward a tiny bit, Claire licked the sealed lips of her crush, slightly raising her arms as she did so, making a warm feeling rush through her body from her crotch.
"I left them alone for now. They deserve to have this for themselves. It wouldn't be as much fun for them if I was watching."
Jane sat on the couch in the living room, her legs pressed to her chest, her cell phone in her right hand, her left hand playing with her collar.
"I think I'm getting better. Maybe you should let me--" She giggled as the woman on the other end interrupted her. "Okay, okay, I get it. But still, those girls made me think. We should totally meet up soon. ... I don't know, tonight if you got time." She bit her lip. "Damn right I am." She closed her fingers around the collar. "Of course I'm wearing it, mistress."