"An orgy"

"Is it Mom, really?" Tasha's face and nipples perked up. Her flesh started to form goosebumps.

"Of course." Mom said proudly. "I had one for my 18th birthday. It's only right that you have one too."

Tasha closed her eyes, bit her lip again and let out a long, teenaged moan. "When does it start?"

"Soon. The whole thing is planned. You just have to put on your new dress... and then, eventually take it off." Mom smiled.

Tasha's voice cracked. She was hesitant to ask something. "Are you.. are you joining in?"

Mom sighed. "You know our rule. No naughty bits with family. We're playmates, not perverts."

"Even now that I'm 18?"

"Yes, even now that you're 18."

"Okay." Tasha was disappointed. But still, there was an orgy to look forward to. She slipped her hand down between her strong young thighs, and then lifted it back up, her fingers glistening and cool in the morning air. "My fingers aren't naughty bits. You can play with those if you like."

And Mom flashed a smile that Tasha knew very well. A smile that meant she was proud of her girl, and feeling quite amorous. She leaned in and licked the juices off her daughter's fingers.

Then, caressing her daughter's cheek, explained something. "Now honey, you're going to have to trust me today, okay? There's something special about this orgy, but something strange too. It might not be exactly what you're picturing."

"I trust you, Mommy" Tasha whispered, her whole body slowly being overcome by the situation.

"Good."

"So.... what's special about it?"