Make a surprise confession

Erin put her head down, her curls falling in her face. She tilted her head up, looking at her big sister from the tops of her eyes.

Gretchen knew something good had to follow. Maybe Erin was about to admit to fantasies of her own... or something.

"Okay.... I admit." Erin said softly.

Gretchen smiled. This was working perfectly, in fact more quickly than Gretchen had anticipated. She had Erin in the palm of her hand. Now Daddy would be harder. "Admit what?" She asked, feigning innocence.

"It's... it's me in those pictures." Erin said.

And suddenly Gretchen had no idea what her kid sister was talking about. The room was silent for a few good seconds. Gretchen shifted uncomfortably. Whatever it was that Erin was confessing it was not what she was expecting. And while she didn't want to give that away, her face betrayed her. A perplex look painted itself over Gretchen.

"You saw those pictures online didn't you?" Erin said, clearly embarrassed.

Gretchen tried to figure out what she meant. What pictures? What kind of pictures would her sister be posing for? And what did this have to do with all her **** teasing. Gretchen had to guess. "Pictures with.... daddy?"

"No!" Erin exclaimed, raising her head back up, suddenly realizing that maybe Gretchen didn't know what was going on. "The ones with Mr. Arbor."

Gretchen's mind tried to process that name. It sounded familiar. She thought and thought, and then remembered. "The Physics teacher?"

"Yeah" Erin said, curiously "Isn't that what you're trying to get me to admit to? You know with all this **** stuff?"

Gretchen was still trying to piece this together. "What would that have to do with it?"

Erin's face was slowly getting painted with the realization that she wasn't being set up. But she'd have to admit and explain this anyway. "Well... we were playing daddy and daughter in the pictures. Isn't that why you were telling me all that stuff?"

The pieces still weren't adding up to Gretchen, but something was becoming quite clear. Her little sister was a little naughtier than she'd been letting on. "No, I was just telling you a story." Gretchen answered. "But I think you have a better one. Why don't you explain the whole thing."

And Erin took a deep breath and another sip of wine. "Okay... the whole thing." Gretchen was eager to understand this finally. Erin went on "Mr. Arbor and his wife have this... um... website that they run, tabootime.com. And they use students from his class for the... pictures."

"Dirty pictures." Gretchen said, not really asking, just confirming.

"Yeah" Erin tried to eek out a smile.

"And you've posed for some." Gretchen felt a little tinge of disappointment, though she wasn't sure why. Her whole goal today was to get her sister to embrace her kinky side.

"Of course" Erin answered.

"So that whole innocent show you were putting on a few minutes ago?" Gretchen asked. Maybe that's why she was upset. Erin had lied to her.

"Well..." Erin blushed.

"So you haven't only been with seven guys?"

"No... I have" Erin nodded. "But four of them were at Mr. Arbor's place."

And suddenly Gretchen felt jealous of Mr. Arbor. After all, she'd wanted to be the one to seduce and corrupt her sister. But this guy beat her to it. Maybe that's why she was upset, she thought. She wanted to find something uncouth about this whole situation. "And students do this for good grades?" She asked with a bit of spite.

"No... they do it because they want to. Because Mr. Arbor is handsome. And his wife is really pretty. And they're eighteen year olds. They think about sex all the time." Erin shrugged.

"Do you think about sex all the time?" Gretchen asked.

"I did the pictures didn't I?" Erin took a swig of wine, clearly feeling more confident.

And in fact, the more Gretchen thought about it, the more it seemed like a brilliant setup. Mr. Arbor and his wife had a great gig going. His students were all seniors so they'd be legal, cheap and probably very willing. What an easy way to make a buck. Still, it was going to take a second to appreciate this secret of her sisters.

"All the pictures are taboo themed?" Gretchen asked. "****?"

"And other things." Erin answered. It wasn't as if she had to be ashamed. After all Gretchen had just admitted to fantasizing about their father. How could she judge?

"And that turns you on?" Gretchen asked.

"It did while I was doing it." Erin smiled.

It was official, Gretchen thought, she and her sister, two good girls, raised right, with money and education, had independently become freaks. Something about that actually made her smile. Maybe it was nice to find out that they had something secret in common. And she had one more question for her kid sister...