Acting out the male part, Susan slammed into Debbie's wet, hot cunt over and over again, deriving almost as much pleasure from the simulated sex act as Debbie.
"Don't stop!" Debbie screamed, echoing Susan's words.
As Susan continued fucking Debbie, the older girl reached behind her quivering buttocks and jammed her middle finger up her asshole. Susan nearly hit the ceiling. She slammed into Debbie's cunt harder and faster.
Debbie started to sob. "It's top good!" she cried. "Fuck me… fuck me… FUCK MEEEE!"
Susan was afraid she was beginning to hurt Debbie, but when she paused, the dildo dripping Debbie's pussy-sauce, the older girl begged for her to continue. She climaxed more times than Susan could count.
Finally, Debbie passed out.
"Oh no!" Susan cried out in alarm, thinking she had killed the girl. She started to shake the girl by the shoulders. No response. Then she slapped her hard several times on the cheek, leaving her palm print on the girl's flushed face.
Then Debbie opened her eyes and gazed up at the startled shaking girl. She smiled weakly and shook her head. Susan breathed a deep sigh of relief.
"Are you alright?" she asked, her voice trembling.
"Yes… wow… I've never passed out before… God that was good. I mean really fucking good!"
"I think you've had enough for one day," Susan said, untying the dildo from her waist. "Is there something we can eat? I'm starved!"
Debbie smiled. "Yeah, I'm famished myself." She sat up, feeling momentarily dizzy, then surprisingly clear headed.
"You sure you're okay?"
Debbie nodded. "Let's get dressed and go down into the kitchen."
"I think we've both had enough sex for one afternoon," Susan said, getting into her bikini.
"Normally I'd say that wasn't possible. But now… yeah, I think you're right." She gripped the young girl's wrist. "Promise me we'll see each other again."
Susan smiled, and kissed the girl on the cheek. "I promise."
"Good. Now let's get something to eat!"