Then he saw the dog.

Rex came slinking up behind Debby's ass, his tongue lolling out and his prick hard as a stone under his shaggy loins. Frank blinked in surprise. Debby's head was down in his crotch and her trim little ass was tilted up, and Rex was obviously following his nose toward the girl's pussy.

Frank's mouth opened to shout a warning. But, hovering just below the crest, words failed him. He gurgled incoherently.

Rex shoved his big head out and his snout slid under the hem of Debby's short skirt. She blinked. A sound came from her lips but, muffled on her daddy's cockmeat, it was hard to tell what sort of sound it was.

Had she giggled?

She kept sucking, regardless – and the dog kept shifting his head around in her groin.

Then Rex flipped his muzzle up, tossing Debby's skirt up over her ass. Frank saw that the naughty girl was not wearing any panties. Had that been by design? Had she planned to seduce him all along? Frank leaned down, staring at Debby's crotch. Her pink cuntlips were unfurled like the petals of a fleshy flower, streaked with her pearly dew. Her clit was stiff and tingling. Then his view was blocked – as the dog thrust his muzzle into her crotch again.

Shocked, Frank hovered there, just under the spurting peak, his ejaculation delayed for a moment by the unexpected entry of the dog into the situation. He wanted to drive the dumb brute off – but Debby did not seem to mind! She was sucking his cock as eagerly as ever, not missing a stroke. Jesus! Didn't she know the dog was tonguing her cunt? Didn't she care? Oh, shit! Did she like it?

And with that thought, his raging lust consumed him. He arched his back, fucking his huge prick deep into her mouth, tilting her blonde head back on his lunge.

He heard Debby whimper and slurp on his prick and he heard the moist sound of the dog's tongue as it slapped into the girl's smoldering pussy. Her head bobbed steadily up and down and her ass began to jerk as she ground her cunt around on the Alsatian's buried snout.