Flashback: Approaching climax

As Adam continues to stroke Sarah's cock, he can see more and more precum flowing down the shaft. Curiosity overtakes him, and he moves his head in to taste the fluid at its source: He extends his tongue to lick the precum right from the cock-heads slit.

He never tasted anything like it, salty and sweet at the same time. As he swallows his first taste of the addictive substance, he is in heaven. Pleasure beyond description, an orgasm ripples through his body, and he can feel his own cock bursting with cum: Creaming his pants, a wet patch clearly visible on his jeans.

After a short time of recuperation, Adam continues with renewed vigor to stroke his sister huge cock. Kiss it, lick it, lap up more and more precum. Soon her whole cock is slick with his saliva. Adam continues to stroke the shaft, trying to make it produce more and more of the addictive substance. Adam wants to taste more. He lowers his mouth on the angry red cock-head, and starts to suck it, to taste the sweet nectar straight at its source.

Soon, he tries to suck in more of its length, but that only causes him to cough and gag. Instead of getting disheartened, he tries to relax, and soon he manages to take in more and more. He seems to be a natural cocksucker. After deepthroating 5 or 6 inches he realizes that this is not even half of his sister huge fuck-stick.

Adam massages Sarah's ball with one hand, using his other to stroke her lower shaft. As Adam continues to bob his head up and down, trying to take in more of his sisters magnificent dick, he can feel it pulsing against his throat, and he can hear Sarah's breath quicken. Her body starts to squirm and writhe in pleasure, and her moans are getting louder.

Encouraged by his sisters pleasure, he continues to try taking more of her cock. After having managed to take down another inch, he can feel Sarah's cock getting even thicker, or his throat getting tighter. Sarah is now moaning loudly and lets out small cries of pleasure. Adam can feel the cock pulsating in his throat. While holding the shaft swallowed, massaging it with his tongue and cums, he starts to stroke the cock with both hand violently. He can feel Sarah's orgasm approaching. Having himself impaled on almost half of her cock, he can hear Sarah cry out loudly. This makes him look up, and to his surprise:

Sarah's eyes shoot open, staring directly in his face, a look of desire in her eyes, and hunger.