Arlene gave a cry and shuddered. Her shoulders were still trembling as her legs pointed straight back. Her toes pointed too and Arlene lifted them up from the bed. She was coming. Terri was sure of it.

"Tell me that again, Tommy," Arlene growled into the phone. Whatever Tommy was telling her seemed to do the trick. Arlene let the phone slip from her hand as she quickly added, her other fingers to the slippery mess between her thighs. She pitched and wiggled and gave weak whimpering ales bf lust as she clawed at the tender flesh between the wet, blonde curls that edged her cuntlips. Terri watched all this in wonder. She wished she knew what her big sister was thinking. After a while, the scene grew less frenzied. Terri saw Arlene blink and try to focus her eyes. She grabbed the phone and mumbled something into it to make sure Tommy was still with her.

"Yes, darling, it was nice. But not as nice as you are. Mmmmm? No, I can't. I've got to babysit tonight for the Carltons. Ohhh, it burns me up. My mother took the call and told them I had to do it. No, I couldn't talk her out of it. But you could come over, couldn't you? Mmmmm, I'd love to see you. I could get the kids in bed early and…

Terri had grown restless. She couldn't very well go on petting her swollen pussy while her sister talked on the phone. She couldn't risk being discovered. What she wanted to do was get out of there.

"Okay, Tommy, see you at eight. Why don't you come around the back way, so the Carltons' neighbors don't notice that a guy's visiting the babysitter."

Arlene lay in bed for another few minutes after hanging up the phone. She looked to be dreaming, her wet fingers still toying gently with her cunt. Then wondered if she and Tommy really went all the way or just talked about it on the phone. To imagine a boy like Tommy actually putting his cock into Arlene's swollen pussy made Terri feel like passing out. For an instant, she experienced the most intense desire she'd ever felt in her life.