"We've got perhaps an hour of light left," she told them. "How do you feel?"

"We can stand another hour, Mother," Julie said, tucking her toga between her legs.

Susan looked at her daughter's thighs, seeing how smooth and lovely they were. Julie was two years older than her brother, and exceptionally beautiful, Her dark blonde hair was long and slightly wavy, and her blue eyes flashed with a wicked sparkle. She was forever moistening her lips with the tip of her pink tongue. She was a sexy little bundle, Susan thought. She wondered if Julie was getting fucked, and that made her wonder if her two children were playing around with each other. It was obvious to her that Julie knew very well that her young brother had been gazing at her pussy.

They finished the soft drinks, then Susan went back to her canvas. Her children went into their pose, and she dabbed more paint, still not paying any attention to it. Her eyes searched out her son's cock again. She saw that Julie had her legs apart once more, the toga in her lap. She was amazed that her children could sit there looking that way and keep their expression blank. Her cunt was bubbling hot, and she had to fight hard to keep her expression calm.

Finally, she called it a day.

As Julie stood up and stretched, the toga lifted higher until the creamy curves of her ass were exposed. Tommy's eyes gazed hotly at his sister's ass, his cock pressing his garment out. Susan's cunt throbbed crazily as she put her paints away.

The answer to her silent question came that very night.

Susan had just gotten out of the shower when she heard soft moans and whimpers. She knew without a doubt what those sounds meant, but she felt an overpowering urge to make sure. Slipping into the hall, she went toward the sounds, and found Tommy with his sister in her bedroom.

"Do you think mom noticed?" she heard her son asking.