God, if they saw her now it would be all she would need! Her heart stopped and she dared not to breathe. They must have heard it, she thought fearfully; but no, the strange noises still came from below her without letup, their intensity increasing with each passing moment. She could discern sounds of heavy breathing and a rustle of clothing scraping against the sand, punctuated by animal-like grunts and moans of pleasure. Her eyes were becoming accustomed to the dark shadows below the hill, and now the light scud of clouds covering the moon opened up and exposed the half-naked figures of her sister and two males on a blanket only a few yards from Ellen.

There was no mistake about it! Jennifer's clearly outlined profile stood out in the moonlight as obvious as a photograph. Ellen paled again and sucked in her breath. This couldn't be happening to her sister it was far beyond her wildest imaginings! Jennifer sat with her legs splayed wide apart, the small bra of her bikini swim suit pulled off to expose the smoothly rounded firmness of her full, pink-nippled breasts. The two boys beside her sat stretched out with their bathing suits clinging to their feet and their fingers and hands fondling Jennifer's large breasts. It was impossible to believe, but Jennifer appeared to be enjoying it. To Ellen's complete shock and further disgust, her sister was holding the two boys' rigidly erect cocks in each of her hands and was stroking them in lewd rhythmic time to the sensuous movements of their fingers which fondled and pulled at the nipples of her breasts.

Ellen let out a low, exasperated sigh as she inched closer to the three figures sprawled out on the sand below her. She could make out the shape of Jennifer's features. God! She was really enjoying it, Ellen whispered unbelievingly to herself. Her sister's mouth contorted into a lewd smile, her tongue licking softly at her wetly parted lips. Her eyes were half-closed, her brow furrowed as if in deep concentration, and her thighs were making a salacious grinding movement that swished softly against the blanket below her smoothly curved buttocks.