Go out to a (secret sex) club.

Gretchen had to think fast. Her sister had offered to do something, anything today, and she had to best use it to her advantage. Thoughts occurred to her and then evaporated from her mind. She couldn't suggest anything too risque in case Erin refused then and there, and her chance was gone as quickly as it started.

Of course, Gretchen didn't know how likely Erin would be to refuse anything kinky. She really had no sense of her sister's sex life.

Then she had a thought. There was a new club in town, The Cherry Orchard. A swingers and sex club. Gretchen knew about it after having a heated debate on it in one of her classes. Her classmate had suggested it was everyone's right to have whatever sex life they wanted and the club was fine. Gretchen thought it was vile, disgusting, misogynist, and should be closed. That was, like, a month ago.

Now she wanted to patronize it, and take her little sister.

She knew Erin went clubbing occasionally with her friends, but the two had never gone together. The suggestion was not without it's risks. Not to mention, if Erin knew it was a sex club, she'd never agree to it, Gretchen suspected. She had to hope Erin had never head of it. And she had to feign ignorance too.

"There's a new club that just opened up, I've been meaning to check out." Gretchen said. "Want to come with me tonight?"

Erin's face washed over with curiosity. "You like to club?" It's true. Gretchen had never come off as that type to her sister. "I didn't know that."

"There's a lot you don't know about me." Gretchen smirked. Boy, did she mean it. "This place is called 'The Cherry Orchard.' I figure any place named after Ibsen can't be that bad.

Erin shook her head. "You can be a real nerd sometimes Gretch." And smiled. It was working and rather easily.

That night, around eight, the girls met again at the house. Dad was still out working, it seemed later and later. He was serious about his politics and proud of the work he did.

Gretchen showed up in a flashy silver top and the shortest skirt she had, which wasn't that short. Erin wore a black dress with red embellishments that hung nicely off her shoulders and clung to her shapely ass, ending just below it. The girls looked somewhat out of place clubbing together, and Gretchen knew they were both overdressed. But she had to keep up the illusion that they were going to a normal club.

She smiled when she saw her little sister. "You clean up nice." Erin stuck out her tongue.

Without wasting much time, the two sisters jumped in the car and headed downtown. As the trip went on, Gretchen tried to make normal conversation about school and the news and family, but her anxiety started to flare. What if the club was obvious from the outside. What if it had pictures on the windows, or barely clad mannequins, or a rope line full of half-naked hussies.

And she wondered what if it didn't. What if they got in easily and she really had to go through with seducing her sister. Was she prepared to do some of the things that were actually going to happen? It was one thing to think about Erin sexually, it was another to act on it, and in a crowded club.

But she could breathe a sign of relief when they arrived at the Cherry Orchard and found it very scantily marked, with just a picture of a cherry above the door. So far, so good. The girls parked and clomped their heels through the puddles on the street that had been left by a rainy day, toward a small rope line.

Gretchen smiled at Erin. Erin smiled back. So far, she suspected nothing.

It was no time at all before they were up to the door. And the door man looked at them with a little suspicion. Gretchen hadn't thought to worry about him giving anything away, but he could. And as she looked at his face, her heart started to sink.

"You're a little overdressed." He said and Erin flung back to her sister with a curious look. Gretchen shrugged. She had to play this right. For a second, she thought, maybe she could change his mind with a little blow job, right here on the street. Then smirking she realized that might tip Erin off. He looked them up and down some more. "Sisters?" He asked. Erin nodded. "Real sisters?" He seemed to really care.

Erin didn't know why. But Gretchen did. They probably didn't get that many hot sisters here. And Gretchen knew then that he was going to let them in. And she was right. He waved them out of the damp night and into the dim, pulsing club with a smile.

But this was no time to be relieved. Once inside, the intent of the club could become obvious at any second and Gretchen would have to spring into motion. And it did.

The club flashed with pink and white lights. People in various states of undress grinded on the dance floor. Some of them wore lingerie, some underwear, some nothing. No one in the club wore as much as Gretchen and Erin. From the back Gretchen noticed that the DJ was a topless girl. And there were two more tending bar. At the bar, attractive people, still barely dressed rubbed up against each other, women kissed other women, large groups of people flirted.

"Sis," Erin said shakily, taking in the same images as Gretchen, "What kind of club is this?"

"I thought it was a normal club." Gretchen tried to sound as surprised as her sister. "Maybe filled with literary people." She looked over at Erin.

Erin stood frozen, biting her lip, her hand rubbing her neck and exposed upper chest anxiously.

And maybe it was the burden of a big sister, but Gretchen felt protective of Erin and knew that she had to offer her a chance to go home. "Do you want to go?" Although even asking the question seemed surprising. The old Gretchen would insist on going home. Asking the question suggested that she was open to staying.

And Erin noticed it, she turned toward her big sister. "I.... um.... I...."