"Summer Vacation", by Zeferage

The story of a mother, her step daughter and the daughter's best friend, and the summer vacation they shared.

I've been meaning to put this up for a while... Technically it's not incestuous, but you're hereby warned. It does jump around in time a bit, too.

Excerpt:

So naked and helplessly bound, Lisa could only stand there, sexually simmering under the relentless teasing vibrator. Pressure from the crotch rope buried deep within her only fuelled her flames of desire. Her feeble attempts at creating any friction from the crotch rope or coming into contact with the vibrator where utterly useless. The more Lisa struggled, the greater her feelings of vulnerability which in turn increased her sexual tension causing her to struggle more to bring relieve, and in an seemingly endless circle, the cycle continued.

The undeniable consequence of Wanda's actions, the bondage and teasing, and her own struggling kept her teetering at the edge of fulfillment. To Lisa, her love of this teetering was almost an addiction in itself. A quick fulfillment to her lust would, at times, seem like a huge disappointment to her innermost desire. It was this very denial for a quick orgasm that gave her some of the best earth shattering moments of her young life.

In fact the longer she stayed hot and helpless, the greater her gratification would be at the end. Sometimes her need would be so great that she would need a long row of heart stopping orgasms to cure her animalistic hunger. To date, the longest stretch of heart stopping orgasms she had ever needed topped out at eleven, followed by a good night's rest.

Her perception of all the different elements directing her down that lustful road became paramount in her thinking. Lisa could feel each strand of rope as it wrapped around her wrists and waist. Her nipples throbbed, agonizingly at full attention, aching to be touched. Inhaling as deeply as her predicament allowed and thrusting her chest forward simply intensified her aching need. She felt her saliva dripping, from around her gag, onto her chest. Only her toes, besides her fingers, could she really move and as she curled them this reminded her of her trapped ankles, keeping her sex wide open and available, further intensifying her growing craving. Blindfolded, she could not see her moist body glistening to the ambient light as it struck her body, but she has seen pictures of herself from previous bondage games to prove how seductive and enchanting she looked.

Slowly but steadily, as time marched on, frustration mounted from her lack of progress towards an orgasm. Her animalistic hunger for a desperately needed orgasm, which could not be quenched in her current predicament without help, grew in leaps and bounds. Regardless of her resolve to prolong their game, she knew that soon she would be begging Wanda for an orgasm! Promising to do anything Wanda wanted, for her own little piece of total bliss, and this is where the fun really begins!

Lisa could feel her body begging for an end to its torture. Fatigue was a problem, she knew she had been tied for some time but not exactly how long. Not to mention that Wanda had kept her up most of the night before, continually teasing her sex starved body to the brink of an orgasm then abruptly stopping. But regardless of the time or fatigue, her lustful hunger would not subside but slowly increased the longer she remained captive.

Unconsciously her hips gyrated to their own beat as soft moans of pleasure continued to emanate from within. Lisa knew her time for self control had come and gone. Her pleading whimpers went unheeded from her lover, No soft touches, No licks of a tongue, not even a pinch of her nipple or a slap on her butt, Nothing. Nothing! Where was Wanda? Lisa felt herself slipping down that wanton slope, fast. With no bottom in sight, how far would she go?