"Just a thought I had, kid. I wanted to see if your balls would really turn blue if you didn't cum."
She turned and walked away from him, making certain her ass twitched and rolled as she moved.
Now Ron realized the full extent of the trouble he and his sister were in.
His balls did hurt like hell. He'd be sore for a week after being tied up like that, then not getting his rocks off. The woman knew exactly how best to humiliate him, how to inflict the most pain.
Ron hated her with all his soul.
CHAPTER SEVEN
"You really are a cruel bitch, you know that, Ellen?" Ski told the woman, as he laughed at Ron's discomfort.
The teenager swung from the rings, quivering in a mixture of sheer pain and the last traces of his erection. His balls were on fire – and that fire was slowly fading to a painful ache that filled his entire belly. There was nothing he wanted more in the world than revenge on Sid and Ellen.
Yet… yet he had to admit the woman gave great head. If she'd only finished the job!
"What do we do next with our two incestuous young captives?" Ellen asked.
"Let's give the kid there a chance to really swing. Her, too." Turning to Melinda, he reached out and gently stroked her cheek. "Would you like to help your brother out of his fix?"
She tried to bite his hand but missed. Her teeth clacked together loudly in the stillness of the deserted gym. She had long since given up any hope that they would be discovered. All the kids were up in the cafeteria at the disco dance by now. And even the guard usually patrolling the school seemed to have taken the night off.
She and Ron were alone. They'd have to get out of this on their own – or not at all.
"I like her, yes, I do," said Sid. "Tried to bite me! A really feisty blonde bitch."
"What did you have in mind for them, Sid?" asked Ellen again. "You seem to come up with the damnedest things." She poked Melinda in the left tit and started the girl swinging slightly.
The woman's fingernail cut into the teenager's boob and started a little trickle of blood. The sharp contrast between the red blood and the snowy white skin seemed to fascinate the woman. She cut another little gouge in Melinda's right tit, enjoying the sight of the girl squirming in pain.
"So responsive. Do you think their nerves are closer to the skin or something, Sid? Look at the way she twitches when I even touch her." Ellen slapped the girl across the face. The loud ringing didn't go away for a few seconds.
Then Melinda heard, "… so we drag out the trampoline and let 'em bounce each other a while. In a sexy way, of course."
"Let's do it."
Melinda watched as the two coaches set up the trampoline. Ellen bounced a couple times on it, testing.
She called out to Sid, "Hey, I think I like this. To hell with them. Let's you and me fuck! This is really kicky!"
"First things first. We want to teach them a little lesson. I'd say the lesson isn't anywhere near finished until they've actually gotten it on – right – with each other."
"You're sick, Sid. I think that's why I like you so much."
"Help me with the girl. I can handle old Blue Balls over there."
"Sure he won't cum in your face?" she laughed.
"Shut up and get Goldilocks up on the trampoline."
Melinda watched, helpless, as they cut the strands of adhesive tape that had imprisoned her on the wooden bar. Her hands were still tightly bound behind her back. She found her legs wouldn't support her, either. The two dumped her on the bouncy surface.
Trying to stand up on the trampoline was impossible. She needed her hands for balance – and they were tied behind her.
She simply sat down and waited. The teenager watched as they cut her brother down from the rings and refastened the tape on his hands. The bound youth was tossed onto the trampoline.
Melinda and Ron bounced up and down a few times before the thick nylon fabric ceased its up-and-down motion.
She thought she was going to get seasick.
"Go to it," Sid urged. "Fuck away. Blue Balls needs it, Goldilocks. Besides, you can't refuse your brother. Not after he's already popped your cherry for you."
"Go to hell!" snapped Ron.
"We can fix you good, kid. Watch it. And get to fucking."
"NO!"
"Ron, maybe we should…" Melinda began. Then she was tossed up into the air as Sid's heavy weight came onto the trampoline. Helplessly, she watched him roll across the surface to Ron, grab him firmly under the arms and lift him up off the trampoline.
Her brother's weight crushed her as Sid threw Ron on top of her. Instinctively, she opened her legs as Ron came flying through the air. The position they ended up in was anything but brotherly-sisterly.
"See, they got the idea, Sid," chortled Ellen. She began bouncing the trampoline and watching the mock-humping action.
"No good. I want them to really fuck each other." Sid rolled across and looped a strand of the sticky adhesive tape around both their wrists. Ron was firmly fastened, face to face, crotch grinding to crotch, with his sister.
Melinda groaned a little as she felt the tape touch her skin. She remembered what it was like when they ripped it off her before. This was going to be worse. She knew that their motion on the trampoline would slowly pull on the tape. Her skin would be yanked off in huge hunks.
"Now they're in the right position to fuck each other. Go to it, Blue Balls. Give us a good show!"
"You slimy bastard. You… ulp!" Ron couldn't finish his sentence. Sid had jumped off the trampoline, sending brother and sister flying into the air. As they bounced up and down, Ron became acutely aware of how well the coaches' plan was working.
He was getting an erection. Being so close to a seductive young girl – to hell with the fact that it was his sister – was starting his hormones racing. His breath was coming faster just from her nearness.
"Sis, I'm sorry! I can't help myself!"
"That's okay, Ron. Just… just do it good! Show that we're better than they are!"
"You really want me to?"
"Yes! YES!" And she did.
Her brother's closeness was starting her cunt to flowing. The love juices were beginning to leak out from between her pussy lips. And the band of adhesive tape holding them together insured that his cock would press into her cunt.
She sighed as she felt his prick hardening into a long, fucking tool. He had been about half-erect when the coach had tied them together. She enjoyed the sensations rippling through her body as his cock began stimulating her sex lips.
As he got a raging hard-on, he was poking the knobby tip of his cock into her cunt. The feelings swelling inside her were wonderful. It was so much nicer having him fuck her than either of the coaches. It gave the young girl a sense of contentment.
Her brother would treat her right. They wouldn't have done this, otherwise. She was still scared of what else the two sadistic people watching them might do, but as long as her brother was close – very close – it couldn't be too bad.
She hoped.
The motion of the trampoline started them rocking. She took the pressure of both their weights on her aching shoulders. Somehow, the motion eased her agony. It was almost nice. Then she realized the reason for thinking that.
This was the same rocking motion two people fucking used. It was an age-old rhythm. No wonder it was relaxing and exciting at the same time!
"Good Ron. Do it to me!"
"Yeah, Ron, do it to her. Let us see you fuck your own sister!"
"Don't pay attention to them. Just fuck me!"
His hips spasmodically jerked forward. The blonde girl had to gasp. Her brother's cock had been just inside her cunt lips. With that movement, he thrust his cock all the way up her cunt. She was in possession of his entire prick.