She watched her daughter move the tip of her tongue up and down her brother's cock, touching the tip lightly to his prick shaft. Still baking his balls, Marla leaned close and began to lick at the other side of Bob's cock. She gazed into her daughter's eyes, flicking her tongue toward Sally's. Their tongues touched, and them both licked up and down the shaft of Bob's cock, with Sally licking more eagerly. Both ran their tongues upward, across his smooth, still swelling cockhead.

Bob watched their tongues meet, gasped as they swirled against each other. His cock was starting to drip again, and his mother licked across his piss-hole, swiping up the juices. Sally, letting her mother take the lead, and following along with her own tongue, probed at her brother's piss-hole when Marla moved her tongue to one side of it. She tasted the hot juices coming from her brother's cock, and her eyes became glazed for a moment. She moved her tongue slowly across his piss-hole, and a low, throaty gurgle came from her mouth.

"Ohhh, not bad, Mother!" she whispered. "It's not bad at all."

"I know, baby," Marla smiled. "I love that taste."

She moved her lips to his piss-hole, sucking at it. She pushed down and took the head of her son's cock into her mouth, licking strongly. When she pulled her mouth off, Sally slowly and hesitantly placed her lips about his swollen, creamy-smooth prickhead. She felt the heat of her brother's cock between her lips and rolled her tongue about it, her eyes flashing.

Bob writhed his ass with pleasure, and Sally jerked her mouth back off him quickly.

"Don't move, Bob," she said.

"He can't help it, Sally," Marla said. "It feels very good to him, and you know you can't be still when my face is between your legs."