Jacob opens up the door for the massive creature, "Grandpa?" He asks, shocked and slightly frightened by the big naked husky standing before him.
He let's out a loud bellowing laugh, "Of course, who else would it be," he says laughing, patting his grandson on his furry shoulders. "I see you're old enough son."
"Old enough? For what?" Jacob questions.
Grandpa just lets out another loud laugh. "When us men of the family get old enough, we recieve these magic buttplugs, letting us transform into our canine persona's, and might I add, I'm particularly proud of how yours turned out," he says running his big paw along his grandsons canine body, gripping Jacobs bright red cock, causing it to quickly tense up.
Jacob withdrawals it quickly, out of embarrassment and concern. "Am I stuck like this?!?!" He asks his grandfather, practically screaming.
Once again, all grandpa does in response is laugh, "no no son, it's only temporary, soon you'll be able to remove it at will, but it'll be a week or so, just in time before your parents return."
"B-but," Jacob stammers, "how will I go outside, how will I see my friends...how will I shit?"
"Well go ahead and try," his grandpa retorts.
Concerned, Jacob does as he's told, haunching over the carpet and beginning to push. Instant he feels the rubber buttplug begin to stretch, forcing the hole in the center to expand, and push against his asshole walls, leaving him letting out a loud howl of pleasure, unable to stop the endeavor, as a large greasy turd falls onto the floor.
Jacob stops and catches his breath, shocked by what happened. "See," his grandfather says, cleaning up his grandsons mess. "Now I can't leave you alone during this, so you better come with me." Jacob meerly nods as the two dog men lock up, and entering the old station wagon, heading off to Jacob's grandfather's home for a long week.