Then the youth inched his hands farther under the smooth curve of Jennifer's hungrily trembling ass-cheeks and squeezed her white undulating moons with a savage strength. The wantonly writhing girl began a rhythmic squirming movement in an attempt to capture the entire length of his sperm-filled shaft inside the hot pulsating passage of her cunt. Ellen strained her eyes and could see the moistly clasping lips of her sister's hungrily flowering pussy sucking tightly around me hard rubbery head of his fleshy instrument. Ellen's eyes gaped open in stunned disbelief as it skewered deeply in, then came pulsing downward on the outstroke and grazed its long white ridge against the softly curling pubic hairs that gripped teasingly at the semen-bloated fullness of the underside of his cock.

Now Jennifer was churning her eagerly writhing buttocks and glistening white thighs more rapidly. Rippling mewls of pleasure spilled from her wide open mouth and accompanied the lewd slap of naked flesh on flesh and soft scrape of sand beneath the obscenely pounding bodies. Ellen lay crouched on the sand, numbed with shock, and watched hypnotized as the sperm swollen sack of her fiance's brother's balls slapped against the flat plane just beneath her sister's nakedly exposed buttocks, the girl's legs curling and uncurling in animal-like desperation around the sinewy muscles of Phil's lower back.

"Oooooooh, fuck me now, darling, fuck me now," Jennifer moaned up into his open mouth, her eyes clenched tightly shut, her pelvis grinding.

Ellen held her breath again for what seemed like the thousandth time since she had climbed up the sand dune a few moments before. Both Jennifer and Phil were breathing heavily, and Ellen noticed streams of perspiration trailing down their nakedly young bellies as the incessant smack of their sweat-moistened flesh built into an insane crescendo of lust that would lead inevitably to orgasm. Ellen could see one of his hands clench and unclench around her sister's rounded white ass cheeks as he pumped and hollowed his buttocks into her groin and moved his other hand up to her breasts to begin squeezing the passion inflamed nipples in a final gesture of frenzied lust.