He looked up at her, then left to take a shower.

Susan stood at the sink, sipping at her now warm coke, thinking of what she had donewith her son. She was not startled to realize she had enjoyed it, enjoyed it so much she, too, had almost come in her panties.

Climbing the stairs to the upper bedrooms, Susan wondered if this would have happened if she had not divorced her husband two years ago. By the time she arrived at her bedroom, she decided it would have happened no matter what because she knew herself, of her desires, of her intense interest in sex.

She stood in the bedroom, her cunt throbbing furiously. She opened her blouse and cupped her shapely, firm tits, thumbing her sensitive, rubber-hard nipples.

She was standing there, holding her naked tits, when Billy came to the door.

His eyes went wide as he saw her tits, and the towel about his waist suddenly poked out, his cock lurching into hardness again. Susan smiled at her son, offering her tits to him.

"Kiss my tits, darling," she murmured. "Come on in here and kiss mother's tits."

Billy came in, his legs wobbly, his eyes fixed upon his mother's sweetly hard nipples, the creamy flesh of her tits. He stopped a few feet from her, his face level with her naked tits. "Gosh, Mom!" he croaked. "I never saw…just once."

"Me?" she asked. "How did you see my tits, Billy?"

"Not yours, Mom, Karen's."

"You saw your sister's tits? When?"

"A few weeks ago," he said, licking his lips. "She was playing with them like you were doing."

Ripples of delight ran through Susan's body when she heard that, and she reached out with one hand. She pulled the end of the towel, and it fell to the floor. Her son stood there naked, his cock pointed, hard, dripping.

Susan gazed at her son's cock, seeing the head, swollen smooth, dripping from that flaring piss hole. There was not much hair at the base, and his balls were totally hairless. She ran a fingertip along his cock and saw him shiver, his eyes turning glassy.