"Holy shit!" exclaimed Marci when the nanny goat's thick, wet tongue began licking her brother's soft prick.

"That's a good girl," she heard Kirk softly whisper as he unbuckled his belt and dropped his jeans and shorts down around his ankles.

Marci excitedly watched as the goat lovingly licked his balls as well as his rapidly swelling cock. When his prick had reached a throbbing erection, the animal's tongue was feverishly licking up and down the meaty length of his cock.

"God, what a cock-sucker!" cried Marci, feeling the hot juices leaking out from between her legs as she watched the goat eagerly going down on her big brother.

When the goat had licked Kirk's cock to a throbbing hardness, the youth gently turned the animal around so he could invade her juicy cunt from the rear. Having been fucked by Kirk often enough to know what was coming, the goat was trembling with delicious expectation.

Watching her brother guiding his bloated cock-head toward the animal's pink, wet pussy, Marci was surprised at how much the animal's cunt resembled her own. Excitedly rubbing her hot little pussy through the material of her tight jeans, Marci could see her brother's deliciously naked tool slipping in between the shivering, goat's pink cunt-lips.

"Oh, fuck, she's nice and hot today!" panted Kirk as he felt the scalding slickness of the animal's slippery pussy walls closing around his tingling boner.

Seeing how the excited goat was backing up against her brother, Marci realized the horny animal was trying to work even more of his prick into her sizzling cunt.

"Jesus, Kirk!" Marci exclaimed to her brother. "She really digs your cock."

"You're not shittin," he groaned. "This stupid goat loves to be fucked."

After a short pause, Kirk partially withdrew his hard boner and began fucking into the bleating animal with long, rhythmic thrusts.

"Fuck her good, honey!" his excited sister cheered him on.