I guess I forgot to upload the conclusion. Too bad, too, because it's the best part

"Please..." Michelle uttered meakly before her air supply was cut off. While one sister looked on in delight, the other was paralyzed by the sight before her of Michelle lying on her side, her face expressing silent agony, trapped by the arm of her smiling tormentor lying behind her.
After about thirty seconds, the pressure around Michelle's neck eased enough to, while still being painful, allow her to breathe. "Jessica...help!" Michelle yelled, hoping that she wasn't setting her sister up for the same fate. Through tear stroked eyes she was just barely able to see Julie running up to intercept Jessica.
Michelle soon found her earlier prediction to be true. Powerless to help, she was forced to watch as her sister was as soundly beaten as she was. Despite being both younger and smaller, it took less than two minutes for her rival's little sister to force Jessica to a tearful submission. With one arm around Michelle's throat, Andrea used her other to gently caress Michelle's bare stomach.
"So, how do you like seeing your little sister getting beaten up like this. I didn't realize she was even more pathetic than you." Michelle could only sob in reply. She could hardly deny losing the fight, but Michelle had managed to hold out for much longer than Jessica against someone her own age and size. Despite her pleas for mercy, Julie continued to throw Jessica around and batter her with punches. Jessica was putting more effort into trying to escape than fighting back and depite her own predicament, Michelle couldn't help but feel ashamed at her sister's performance.
She could do nothing for Jessica, however, with Andrea lying right behind her. She was beginning to grow very anxious of what Andrea had in store for her as every once in awhile, her rival had leaned over to lick the side of her face. Soo, her captor's finger began to send a shiver down her spine as it was lightly twirled in a circle in the area around Michelle's belly button. At this point, Julie was sitting on Jessica's back continuously pulling her chin back and releasing it to rub her face in the sand.
After seemingly endless minutes of torture, for Jessica as well as Michelle who was forced to watch her sister being dominated, Julie leaned back to face her sister. By now, Michelle's tormentor had stopped caressing her stomach and was now squeazing her breasts and pinching her nipples in a display of ownership. Michelle hated the prospects of what this intimite violation of her young body could mean.
"Well, I'm starting to get tired. Do you think they've had enough. Jessica and Michelle were both caught off guard by the question. Somehow, they didn't think this nightmare would ever end.
"Hmm, maybe. That all depends on them." Andrea leaned over to put her mouth right up to Michelle's ear. "Well, how about it little girl? Do you think you've had enough?" Michelle meakly nodded. With that Andrea slid her free hand under Michelle's bikini bottom. "Well, after all this trouble, you have to do some things for me first."
Despite growing up sheltered, Michelle had a pretty good idea of what Andrea had in store for her. She steadied herself before responding. "Anything," was all that she could say. She had always been taught that being with another woman was wrong but she couldn't see any way out of this and shuddered in fearful anticipation of the inevitable humiliation she was about to endure.
Andrea finally let her go and stood up before nudging her onto her back with her foot. Her worst fears were realized when she saw her rival slowly slide her bikini bottom off. She then sat down on her stomach before sliding her pelvis over Michelle's face.
"All right, you know what to do. Stick out that little girly tongue of yours and suck on my pussy." Michelle blushed at the candid way her task was put to her. Michelle, knowing that she and her sister would only continue to be tortured if she refused, gingerly stuck out her tongue.
"Uhh..." was her muffled moan as she was forced to taste the other girl's sex. Sitting atop her face, Andrea was also moaning for the opposite reason as her face was flushed with pleasure.
Seeing her sister face sexual subjugation was even harder for Jessica to watch than her sister's earlier beating and she tried to turn her head away. The smaller girl sitting on her back would have none of that, however. Grabbing a fistful of Jessica's hair, she roughly turned Jessica's head to force her to watch.
Meanwhile, Michelle did her best to pleasure her new mistress as best as she could. "Hmm...you like eating pussy, don't you?" She felt ashamed that she was actually good at servicing other women. She continued licking Andrea until she finally began to climax. Michelle could taste the orgasm that was discharging into her mouth and onto her face. She tried to pull away but her mistress had the opposite idea and seemed to by trying to insert her entire face. At the height of ecstasy, Michelle once again found her air supply cut off as both her mouth and nose were envelloped in the other girl's pussy. Michelle would have screamed if she could as seemingly all of her five senses were engulfed in Andrea's orgasm.
At this point, Julie had stood up to look on in amusement. Jessica continued to lie on the ground, not daring to interfere or even look away from her sister's humiliation.
Finally, the undulating on Michelle's face ceased as both she and her mistress caught their breath. Andrea looked down approvingly at the sobbing brunette beneath her as Michelle's face was now covered in a thin film from her orgasm. She wasn't done yet, however, and reached behind her to remove the rest of her bikini. Now topless, she sat down and pulled Michelle on top of her in a cradling position. She then lifted Michelle's head up to her bare breasts. Not even waiting to be told, Michelle opened her mouth and began caressing each of Andrea's breats with her tongue. Eventually, Andrea lifted one of her breasts and put it directly into Michelle's mouth. Taking the hint, she began sucking on her nipples.
When she grew tired of breast worship, she stood up and brought her captive up onto her knees. Andrea then pulled Michelle's face to her stomach, Michelle once again silently complying. She knew she had been stupid to accept this fight but now she realized just how dumb she had been. Despite being the same size, with a body like this, Michelle simply hadn't stood a chance. Even against her tongue she could tell that this girl's abs were rock hard. Her tongue went over every ridge and lapped at her belly button as Andrea gently stroked her hair.
Finally. her tormentor told her to stop and nudged her back on the ground with her foot before getting dressed. Standing over, she said, "Now I think you've had enough. You've been a good little girl so I'll let you go home. Do you want to go home?" Michelle nodded. She just wanted to be anywhere but here. "But first, a deal's a deal. You owe me your top." Michelle reached behind her to untie her bikini top.
I could have just surrendered this in the beginning and avoided all of this, she sadly thought.
"You too," Julie said to Jessica. Jessica had saved up her money for weeks to buy this bikini and almost considered refusing. Then she remembered what this girl had just done to her and thought better of it and reluctantly handed it over.
It won't even fit her, anyway, Jessica bitterly thought.
"Hey, Andrea, maybe we should just bring them back to the house. It might be fun having them around for the weekend. I'm sure you'll have more fun with her," Julie said indicating Michelle. Michelle's and Jessica's hearts almost skipped a beat at the thought of being these horrible girls' slaves for the weekend.
"No, let's let them go," Andrea replied. Jessica and Michelle both gave a sigh of relief. "Taking them back might be more trouble than it's worth."
The two victorious sisters looked down on their beaten rivals, ridiculously covering their breats to hold onto their long lost dignity. "Look at them," Andrea scoffed. "How pathetic. It must run in the family." With that, they picked up the beaten sisters' purses and towels, and left Michelle and Jessica to wallow in their humiliation.