Nicole froze, hearing a man's voice coming from inside. Sarah had to tug sharply on Nicole's leash. "It's alright." She whispered to her captive. "Trust me." The muffled chatter of voices suddenly came to a halt as Sarah led her captives into the apartment.
"Yeah right…" Nicole thought as Sarah brought the two teenagers with her to a halt. Nicole could hear excited whispers coming from what sounded like at least half a dozen people in the artificial darkness of her blindfold. She was already wondering if she would ever live the embarrassment of this evening down. Despite that, beneath her embarrassment a tingle of excitement raced down Nicole's spin.   
"Sarah…" Nicole heard the man say, "When I told you to go get your bondage things, I didn't mean for them to have someone wearing them already…that your sister?...Hey, Rachel, how you doing? Who's your friend there?" Rachel could only reply with a gag-muffled grunt, which made the man laugh again. Apparently, Rachel knew this man and his friends, whoever they were.    
"Sorry, Mason…" Sarah said, "When I got home, I found my sister and her friend were playing around with my stuff. Since they had already got it all on, I figured I might as well bring them along too."
Nicole heard the man, Mason laugh. "And this wouldn't have anything to do with that bet you lost, right?"
"Well, the bet just said I had to serve the food and drink, you didn't say how I was supposed to get them served." Sarah replied.
Nicole felt Sarah untie her blindfold. Sarah pulled out Nicole's glasses and put them on for her. Nicole looked around the room, curiously, as Sarah removed Rachel's blindfold as well.
They were in the back of a living room, behind the middle of three couches that had been set up in a ring facing a large flat-screen television that was playing commercials. Behind the couches a counter divided the living room from a small kitchenette.
The man Sarah had been talking to was a young man in his early twenties, with light brown hair cut short and a neatly trimmed goatee. Around him were around a dozen people, nearly an even mix of guys and girls, all in their early twenties. They were dressed casually in t-shirts and jeans.       
They didn't seem too surprised to see two teenage girls bound, gagged and leashed. Glancing over into the kitchenette, Nicole was surprised to see a young woman about Sarah's age, shackled to the fridge next to a spread of snacks and drinks. She'd obviously lost a bet like Sarah had and got to serve the food tonight.
Sarah led the two other captives into the kitchen. "Alright, here's the deal," She said. "As you can guess, I lost a little wager earlier this evening, and as a result I get to help serve the food and drinks tonight." She grinned, "or rather, since you two are my slaves for the evening, you two get to take my place."
Sarah opened up a drawer and pulled out what looked like some sort of serving tray. It was padded on one side and had a sort of leather loop running from two corners. She looped the leather strap around Nicole's neck, so the tray hung suspended, balanced on her tummy.
"It's real simple," Sarah said, as she did the same for Rachel, "Just walk over to Michelle here," the bound woman standing behind Sarah grunted, "and she'll load you up with goodies for everyone. Take 'em over to the couches and stand there till everyone's gotten what they want, then come back here for more."
"Hey, Sarah!" Nicole heard Gary shout, "Games about to start! Better get in here, unless you changed your mind and want to help with the refreshments!"
"Have fun, you two." Sarah said, walking out of the kitchenette. "You can start off with a coke and some wings for me and Gary." Sarah told the woman. She nodded and loaded the food onto Nicole's tray.
Nicole glanced over at Rachel, who shrugged. Bound as they were, running for it didn't seem like a good idea. Best to play along for now and hope Sarah untied them…sooner or later. Nicole didn't shrug, for fear of toppling the tray, but turned and headed to the couches. She had to walk slow to avoid spilling anything, but then again, with her feet shackled, she could only walk slowly anyway.
No sooner had she delivered the food to Sarah and her boyfriend then she was sent back to the kitchen with another set of orders for the others.

The next half hour or so, she and Rachel were kept jumping, shuffling as fast as they could back to the kitchen to have their trays loaded with a variety of snacks and drinks, than shuffle back to the couches to deliver them.
Nicole quickly fell into the rhythm of things and time passed by quickly. It was almost like a game, Nicole thought to herself. Despite the jeers and snide remarks from her captors, Nicole found herself enjoying serving out food and drinks like this.  
Once everyone had gotten what they wanted, the pace slackened off somewhat, as the two were sent back for refills or seconds sporadically. Most of the guests ignored the two and concentrated on the game with rapt attention. From their excited chatter, Nicole gathered that several of them would, or wouldn't, be spending the weekend in bondage.
Finally, halftime came. Several of the guests stiffly stood up and stretched or headed to the apartments one bathroom, in a silent race to see who would get their first and who would have to wait. Sarah led Nicole back into the kitchen and removed the tray.
From one pocket, she pulled out a roll of keys similar to the ones Rachel had hid in the house earlier today, and unlocked all of the cuffs, the ball gag and collar. Rachel grunted into her gag at Sarah, obviously wanting to be untied as well.
Sarah laughed and tossed the bondage gear to Gary. "I'm taking Nicole here home, while I'm gone, why don't you make my sister a little less comfortable." Rachel glared at her sister. "Someone's got to serve during the second half, sis. Maybe next time, you won't get into my stuff. Come on Nicole."
Nicole glanced back at her friend and shrugged, sympathetically, before turning and following Sarah. They headed down the hallway to the stairs. Nicole found them to be a lot easier when her feet weren't shackled and she could see where she was going.
Outside, it had grown dark while Nicole and Rachel had been kept busy. Nicole silently dreaded the talking too she'd most likely get from her mother when she got home so late. She got in the car with Sarah. The two made small talk during the car trip back, finding they had few common 'interests' they could discuss. Sarah stopped off at her house to let Nicole run inside and get her things, than dropped her off at her house.
"Hey, Nicole, where've you been?" Nicole's dad asked from the living room where he was watching the same game Sarah's friend had been. "Rachel's." Nicole replied. "We lost track of time." Which was true, more or less.   
As Nicole walked in the room, she saw the second half had started. Nicole absentmindedly wondered whether Mason and his friends were keeping Rachel jumping, serving snacks. Part of Nicole was glad to have escaped, part of her was sorry she was missing out on the fun.
"Well, there's still a bit of fish left over from supper. You can zap it in the microwave." Nicole's dad said, nodding his head towards the kitchen. "You mother's already gone to bed."
Nicole brightened up. With any luck, her mother would have forgotten how late Nicole's come in and she'd got off scot free. And if she hadn't…
"Well, at least I won't be grounded until after breakfast…"