Arlene opened her knees, and Peggy didn't hesitate to cup the bubbling wetness of her pussy, feeling it through her skimpy panties. The feel of a cunt other than her own was also strange and exciting, and she rubbed a finger up and down the slit of Peggy's cunt, feeling through the wet panties. Arlene squirmed her ass on the couch, purring hotly. Peggy moved her fingers into the elastic waistband of Arlene's panties, her fingers sliding smoothly through the blonde cunt hair. She touched her sister's knotted clit, making Arlene's hips jerk and a soft, excited gasp come from her throat.

"Oh, yes, Peggy!" she cried hotly, lifting her hips.

Peggy slipped a finger into her sister's cunt, and fucked it in and put slowly. The wet heat, the tightness, excited her, and she pumped the finger back and forth to the slow rhythm of Arlene's hips. Finger-fucking another woman sent shivers of erotic heat through Peggy, and she closed her eyes to savor the feel, the wanton moment of touching and caressing this overheated pussy.

"Oooops!" a male voice gasped.

Peggy jumped.

Arlene jerked her head off Peggy's tits, trying to shove her skirt down.

Her face burned with embarrassment as she saw her nephew, Ted, standing in the open doorway.

Peggy yanked her hand out of her sister's panties and sat upright, trying to appear calm.

Ted, his eyes enormous, didn't seem to know what to do. He averted his gaze quickly, but Peggy knew he had gotten a good look at what she and Arlene had been doing with each other. Ted turned, trying to walk and keep his back to them at the same time – but Peggy had seen the swift hardening of his cock inside his pants before he turned. She watched her son disappear into the kitchen.

"Oh, God!" Arlene gasped. "He caught us, Peggy! He saw what we were doing! I'll die of shame, especially if he tells Henry."

"You'll live, Arlene," Peggy said softly, kissing her sister's mouth quickly. "I have a hunch Ted understands."