Shadow was standing outside of Tails' door, knocking on it. He had been skating past when he felt an unusual chaos-like energy emanating from Tails' house. He didn't like it.

"Tails! It's Shadow! Let me in!"

Inside, the two beasts untangled themselves from each other. They got down on all fours and began to creep to the door.

"Tails! Let me in or I'm kicking the door down!" Shadow threatened from outside.
When Tails didn't open up, Shadow turned to the side. His foot lifted, and slammed into the door, launching the metal rectangle flying across the room. He stepped into the room expecting to see some sort of new Emerald. The view he got was entirely different.

Instead he saw the strange appearances of Sonic and Tails, both standing above his height and looking...quite abnormal.

When the beasts saw Shadow, their many cocks began dripping with pre, and their pussies got soaked instantly, dripping their own juices.

The creature that was once Sonic launched forward, its powerful muscles moving it with ease across the room. Shadow lifted his hand and began to utter his words.

"CHAO- MMMPH!"

Before he could use his famed Chaos Control to avoid the beast, Shadow had received a long cock going down his throat, painful in its entrance and where it stayed.

Sonic facefucked Shadow ruthlessly as Tails moved over behind Shadow. The fox-beast used its hands and gathered its bundle of cocks. With precision placement, and lots of precum as lube, Tails forced all three members into Shadow.

"AA-AAAH!" Shadow attempted to cry out in pain. Instead all that came out was "MMMM" as tears fell down his cheeks.

Tails fucked Shadow from behind as Sonic did the same from in front. However, since Sonic had two members hanging free, Tails decided to take one into his mouth. He sucked it off, using his tongue to get any of the length he couldn't reach.

Sonic used a hand to move his remaining penis between his large breasts. He stuffed the end into his mouth and went to thrust like hell. This forced Sonic's dicks down everyone's throats, Shadow's the most painfully.

In what seemed like no time at all, Sonic and Tails came at the same time. Sonic's cum flowed into everyone's mouth as Tails came in Shadow's ass.

They all fell backwards, Sonic's cocks getting removed from the throats, Tails falling to the floor, and Shadow getting stuck lying on Tails' milk-soaked, pillow-like breasts, as he was still punctured through the ass with three huge cocks, his belly plump with several gallons of cum.

Sonic moaned audibly as he changed further. Two small mounds appeared beneath his current breasts. His cocks gained a few more inches. He even grew an inch taller.

Tails cried out in pleasure as his scrotum gained a new lump that rapidly grew to match the rest surrounding it, and his breasts increased their milk production. The pure pleasure of the change forced Tails to orgasm once more, further swelling Shadow's stomach.

Shadow said nothing as he underwent changes as well. His swollen belly quickly lost its size as a slit opened beneath his balls, another member appeared beside his original 8 inch one, and his balls enlarged several inches.

The combined lust from both beasts spread to Shadow. This made him lustful as well, and as consequence, he started moving on Tails' members to tease his prostate.

Sonic walked over to Shadow. He lifted his cocks and rammed them into Shadow's new pussy, tearing the newly formed hymen and making shadow scream.

Shadow bounced, riding all six cocks simultaneously and ignoring the immense pain as his two lengths bounced alongside him.