As the amazed mother watched her children having sex she felt her initial shock drain away to be replaced with a growing sexual heat. Her nipples began tingling and she felt her pussy soften and begin to moisten. Without even realizing she was doing it Joan slipped her hand under her robe and into her panties. Very quickly she was sliding a finger inside her wet tunnel and rubbing her clit in time with Katie's head bobbing on her son's cock. Joan leaned back on the bathroom counter and put her other hand into her robe to take a swollen nipple in her fingers, rolling her thumb gently over the hard nub. In a few moments she saw Kevin's thigh muscles tighten and Katie began softly moaning while speeding up her head motion on his cock. Joan saw Kevin's toes curl up and his cock pulse in Katie's hand. She knew that her son was shooting his hot boy juice deep into his sister's mouth - and she was obviously relishing it. After she had swallowed all his cum Katie took her head off her brother's cock and arched her back, her head coming up, her face contorted in the ecstasy of her orgasm. Joan watched her cum, it was the first time she had seen another woman have an orgasm and it triggered her own, so powerfully that she almost collapsed onto the floor of the bathroom. It was all she could do to stand on weak legs and watch as Katie reversed her position and kissed Kevin as she snuggled into arms. As she watched her daughter rain soft kisses on her son's face she felt incredibly aroused - mixed with a small tinge of jealousy that her son had found a sexual playmate.

Joan moved as quickly as her still shaky legs would carry her out to the kitchen. She washed her hands in the kitchen sink, the last thing she wanted was for Todd to smell sex on her fingers. Todd she suddenly thought, what the hell was she going to do about Todd? Did she tell him what she had witnessed? That their children were sexually active - and with each other. Her instinct was not to tell him, he was already looking much too actively at Katie, Joan knew the signs, she should. Anyway she thought, she had already lost her son to her daughter, she had no desire to have her husband competing for the little slut as well. As soon as that thought crossed her mind she discarded it, that was unfair to Katie, she was behaving normally around her father, Todd was just being a man. Wave fresh pussy in front of them and their sex drive went into automatic. She poured herself a cup of coffee and took her mug over to the round table in the breakfast nook. As she sat down she could feel the extra sensitivity of her pussy as it contacted the edge of the chair. She wiggled a bit on the chair enjoying the sensation - she was really in a state she thought. She may have to stay home from work today and just play with herself. Joan smiled and took a sip of the strong, hot coffee and closed her eyes remembering the sight of Katie taking her brother's prick deep into her mouth. It was so amazing Joan thought, Kevin's prick looked like a miniature of her father's; and not too miniature at that. That big bulbous head looked just like his, it sure as hell didn't look like Todd's - which to tell the truth, she admitted to herself, had always been a bit of a disappointment in the size department. That line of thought got her thinking about when she was Katie's age. ......(cont)