Peggy's hair gives it away.

Bryan was shocked at first, but then felt Kathryn wrap her soft hand around his hardened cock, and the shock gave way to pleasure as she took it out of his shorts and started softly jerking him off as she leaned forward from the couch to tangle tongues with Sandy.

Peter shook his head as he got his shirt over his head. He looked at Samuel and winked.

Samuel smiled and tapped Peggy on the shoulder. When she stopped licking to look back he said, "I do aim to please, Sandster." Then he nodded at Peggy. With a smirk and a wink to her boyfriend she went back to pleasuring her baby sister.

"Mmmmhmmm," Sandy hummed her pleasure into Kathryn's mouth. That tongue was doing a great job. It knew just where to go. But when her cunnilinguist turned to get a better angle, Sandy felt a soft, smooth chin brush her butt and a tress of long hair slide over her skin.

Sandy jerked her head up. "Peggy!" she squeaked. Startled, Sandy fell sideways and landed on the floor, bumping the table with the drinks. The ice in their glasses rattled. "Oops!" she said. When she saw the expression on Peggy's face, Sandy broke out in a fit of giggles.

Kathryn opened her eyes and gasped, realizing that it hadn't been Samuel but Peggy pleasuring Sandy. Bryan flinched as her hand squeezed harder on his penis. Then Kathryn relaxed and joined Sandy's giggling. Peggy added her brassier laugh, and Peter and Samuel chuckled. Finally Bryan joined in.

"Sandy, sorry hon, I wasn't meaning to yank your chain," Peggy said. "THAT was the boys. But you were just so damn pretty when you mooned Sammy and me that I couldn't resist getting the party started. Are you okay with me kissing up on your pussy?"

"Whoo," Sandy said. She looked up and met Peter's smiling eyes, then looked back over her shoulder at her sister. "Yeah. I like it. Will you do it some more?"

"C'mon up then," Peggy said. She leaned over and extended her hand to help Sandy up off the floor.

"Can I help?" Samuel asked. Peggy shrugged and smiled.

"What do you mean, help?" Sandy asked.

"You lean back on me, I'll hug you and give your titties a some attention while Pegs goes down on you," Samuel said. "You know, 'we all need somebody to lean on,'" he sang.

Sandy laughed. "All right," she said. "Just keep it in your pants."

The purple-brown head of Samuel's erect penis was already poking out of the waistband of his sweat pants. "All right, give me a sec." Samuel made a production of putting his cock away, not incidentally showing it off to the whole room as he stretched the waistband wide and pulled it up over the glans.

"Whoo-hoo!" Kathryn said, winking at Samuel, who winked back.

Samuel tossed his red and gold football jersey to the floor next to Sandy's freshly discarded clothes.

"Hey, then Sam gets to hog that cute butt of yours I was finally getting to love up on!" Peggy complained to Sandy. "I wasn't done. How about you get on your knees?"

Kathryn looked a bit forlorn. Though she still had Bryan's cock in her hand, Sandy's kissable lips were too far away. She wondered if she could arrange to be closer. She looked at Bryan.

Peter casually stood to the side, nude now, with a slowly swelling erection. He was ready to help rearrange people or furniture, hoping to fit himself in next to one of the girls but content to watch if he couldn't. Perhaps Peggy would show off her own very admirable rear end while attending to Sandy.