Jenny knew that incest was naughty.

That only made the promiscuous woman long for her son's prick all the more.

And her daughter had inherited her inclinations.

Like Jenny, Belinda had often listened at Tommy's bedroom door, hearing the sounds of his frenzied frigging and wishing that she could see him pumping away on his prick. She had never dared to approach him in the past. But today the little vixen was feeling really randy. Her finger-fucking had only served to make the girl hornier. She had creamed very nicely, but a hand-job was, after all, only a hand-job.

She was feeling bold and brazen and naughty and most deliciously depraved.

When she heard Tommy call from downstairs, and heard no response from her mother, she figured that the woman must have gone out shopping and that the kids had the house to themselves. She listened carefully and heard her brother come upstairs and go into his bedroom.

Grinning wickedly, Belinda drew a light dressing gown over her nubile body and tiptoed from her room. Passing the master bedroom, she moved clown to Tommy's door and placed her ear to the panels.

She could hear him panting and she thought, too, that she heard the hiss of his hot cock-meat as his fist skimmed up and down on the stalk.

She hesitated, her hand on the doorknob.

Then she turned the knob and very quietly opened the door enough to look into the room.

The sexy little numphette had to stifle a gasp when she saw her brother standing naked before the full-length looking glass, industriously pulling his prick.

She trembled violently. Her nipples shot out like high caliber bullets and her cunt echoed that swelling, tingling in her swampy cunt. Her green eyes were glued on her brother's magnificent cock.

It was quite the largest that the girl had ever seen and despite the fact that it was her brother's cock or maybe because of it she was seething with desire.