When she had wreaked havoc with the cock head's nerve-studded rim, Joan began snaking her tongue up and down the sloping surface of the bulb. She caressed the meaty prick head thoroughly, until the bulb shone with her spit.

The dog whined some more and began shuffling his feet. Joan calmed him with both hands as she continued to lick his prick. Her eager licks made the dog's prick bounce up and down and from side to side, but she never let up.

She kept licking the fat prick head, moving her tongue around to the underside. She jolted more nerves and caused hot blood to gush through the animal's cock veins faster than normal. She soon had her hands full, keeping the dog from bolting.

Before she knew it, the dog's entire cock was bulging out of its sheath. The pink glistening prick was long and hard and fat, just perfect for busting cherries. But Joan wasn't quite satisfied.

She opened her mouth wide and engulfed the greasy prick. The fucker stretched her lips dangerously as she deep-throated it. She grunted and gagged until she finally forced her lips all the way down to the dog's fat balls.

She moaned mindlessly, with bugged-out eyes, the whole time she held the prick deep. It was as if the prick tasted too good to let go.

Finally she did release the prick, but only so she could work her lips up and down the heavy cock shaft. She sucked the cock hungrily, gobbling it up again and again, as if she couldn't decide whether or not to swallow the fucker.

The animal humped once and began whining. Joan stroked his balls with one hand to calm him, but that only worked for a while. As soon as she began to chew on his cock root, he grew wild again.

"Oh, Mommie," said Jill, still on her hands and knees, "I think he's ready to fuck now. You're not going to hog my birthday present, are you?"

Joan bobbed her head back and forth on the dog's cock, ignoring her daughter. She pumped the cock shaft greedily, her clinging lips massaging every bump and every vein. She made the prick greasy with her spit, and turned the prick shaft from pink to purple. Soon her cheeks bulged out like a chipmunk's as the dog's cock simply grew too big for her.