Chris squatted down, grabbed the back of Justin's head by his hair and pulled back. "What do ya think, want'a be a little piggie?" asked Chris, although he had of course already made up his mind.
"No please, I'll do anything. Please just stop." pleaded Justin as he struggled even harder to get free. Each such movement though sent more fear and pleasure though him as he both rubbed and was fucked by his own cock simutaneously.
"Oh, I know you will, but you won't have a choice in what." retorted Chris. With his free hand he began to massage and knead Justin's buttocks until they began to swell and stretch out wider. Chris continued his work on the buttocks for a few moments until they were at least twice the size they were and had started to push against Justin's restrained limbs. Justin found that although his buttocks were larger and softer his ass hole had in fact shrunk tightening its grip on his erect cock.
"And now of course we need this." Chris moved his hand to the top of Justin's buttocks at the base of the spine and immediately a small tail began to grow. It lengthened and curled as it took the frm a pig-like tail above two round soft buttocks.