A group of them had been meeting for a few months. It was a nice group of kids, most of them regularly attended the parties, but there were always a few different ones. It was by invitation only. John had to be careful to have the same number of boys and girls. So far the evenings had been typical makeout sessions. Lots of kissing, pretty hot and heavy, as well as some petting. Some girls didn't allow much petting. but some allowed more, including under the clothes. It seemed pretty exciting for the group of high school seniors, mostly because the partners were always changing. No boy/girl friends were allowed. Everyone was completely "single", and no-one had the same partner two times in a row. But it was soon to take a turn that would make all of this very ordinary.
The parties were held in John's basement, a nicely finished room with two couches, some chairs, a TV, and a good sound system. Even an outside entrance. The nicest thing about the room was that John's parents never came down. Maybe it wasn't so nice for John. His parents didn't really give a damn about him. He could do about anything he wanted as long as it didn't affect them. To be fair, his mom had died years before, and his dad was remarried. Since his mom had died, John pretty much raised himself. All in all, he had turned out well, so far. But you can see why his house was such a popular spot.
The night that began to change things started as an ordinary night. Each couple was deeply engrossed in kissing and fondling, enjoying the music and each other. Just before things would start to wrap up, Tyler went over to John, interrupting the couple in mid-grope.
"Dude, I gotta go upstairs. Can we use your room?" Tyler asked.
"What for?" said John, very unhappy to be interrupted.
"Cassandra is hot! Man, I'm all over her, and she's willing to do it. We need a bed!"
"What?" John was amazed. "You want to use my room to screw Cassandra?"
"Man, I want to use any room to screw Cassandra. I'd do it in the hall, but she wants a bed." Tyler was desperate. "And you said your parents aren't home. Come on, Man!"
"Shit, go ahead. But don't make a mess!" John couldn't argue much more, and he was anxious to get back to his girl for the evening.
Tyler and Cassandra ran up the stairs, and didn't return until most people were gone. In the meantime, another new event had taken place.
Everyone knew where Tyler and Cassandra had gone, and what they were doing. It seemed to make the temperature rise in the room, knowing that one of the couples was actually having sex right there in the house. So when Joan broke out of her embrace to go to the bathroom, Evan was turned on enough to give her a challenge. He had gotten her blouse completely open, and her bra undone, so that he had been enjoying complete access to her bare tits.
Now, understand, the basement room was close to complete darkness. Each person could see their partner, but not that well. The only light in the room was a dim table lamp at the foot of the stairs, and it sat in an alcove that limited where its light spread to only the center of the room. All of the seats were away from there, leaving the couples in the dark. But to get to the bathroom, a person had to walk to the center of the room, past the stairs and the lamp, into the next room. Though the lamp was dim, it cut through the darkness at that location, so anyone walking past was easily seen by everyone.
Evan challenged Joan saying, "I dare you to go topless."
He was hoping she was as turned on as he was. He knew that she loved to be the center of attention, and she was a bit of an exhibitionist. And after all, she had let him nearly strip her topless after Tyler and Cassandra had left to have sex. With all of this, he thought he might have a chance of her accepting the challenge.
Joan had sat perfectly still since Evan had issued his challenge, but suddenly she moved her shoulders so that her blouse slid down her arms, and she slid the bra straps down as well. She sat there topless, looking at Evan.
"Go ahead," Evan smiled.
Joan smiled back, slowly stood up, and walked proudly into the lighted part of the room, past the lamp, and through the door. There were a couple gasps as some saw her walk exposed through the light, but most had missed it altogether. After the toilet flushed and the door opened, everyone in the room was watching to see Joan come back through the door. Would she still be topless?
Indeed she was. Walking tall and proud, her round, beautiful breasts swaying gently as she went, on total display for everyone to see. There were more gasps, and several of the guys cheered her. Some of the girls liked it as well, but some slapped their partners for enjoying it too much. In fact a couple of the girls left soon afterward, before the party had broken up.
Before the next party several changes took place. John brought an old single mattress in from the garage and put it in the next room. It was a laundry room with a bathroom, and had sufficient room for the mattress. John didn't want people using his bed any more for sex. Well, unless it was him.
Another change was the people he invited. The girls who had seemed offended by Joan being topless were not invited, and others were discussed as to their willingness to go along with such behavior. Only girls thought to be willing to indulge in more wild behavior were invited. The guys were chosen as well, but they were easier to pick. Most guys would happily participate.