Amy's suspicions were soon confirmed as soon as she pressed her face harder into Peach's nether regions. The drooling cunt loosened further and began to stretch over face. Amy breathed in the intoxicating scent of Peach's lust and her cum flowed into her awaiting mouth.
Unable to resist herself, Amy gave one hard push forward and plunged her entire head into Peach's pussy!

"MMMMMMMM!!!" Peach's screams although muffled came with such a ferousity as she felt that hedgehog's large head stretch out her enflamed vulva. She could Amy's skull now within her birth canal. Her eyes rolled back as she had something bigger than Sonic's cock spear her.
However, before her blue lover could question what had just happened, he quickly returned to moaning as Peach took in his member to the hilt. With Sonic buried to the blue balls in Peach's hungry mouth, she started sucking him harder to catch up with Amy. Peach refused to cease one pleasure in favor of another. She had one hedgehog's big wang inside her mouth, and another hedgehog up to her neck within her hungry cunt.
Nothing would stop Peach from feeding both of her holes.

While Sonic threw his head back at Peach's impressive blow job, Amy could barely move her head in Peach's tight embrace. Her inner walls squeezed tightly against her, coating every inch of their hot and slippery surface onto her body. Amy moaned as she recieved the best massage of her life, and this was only the beginning.
Soon Peach's cunt began contracting around Amy, pulling more of her body in. Her small shoulders easily passed through, and then came Amy's chest. She moaned as her boobies were slowly squeezed in, the pressure creating a pleasant friction.
They were taken in with a loud slurp.

Sonic could describe in so many ways how incredible Peach was right now, but unfortunately that was the very reason why he could not speak. She deep throated him with each passing second, plunging his cock down her hungry throat. How she could still breath right now was of no concern to Sonic, as Peach seemed to be doing just fine.

"So yummy." was the only thought in Peach's mind. The delicious taste of Sonic's member was driving her tongue crazy, and the feeling of her ravenous pussy eating Amy was absolutely delicious.
Each plunge brought Peach's face to Sonic's pubes where she breathed in their musky smell. It seems she was still hungry for hedgehog, as he mouth and throat widened easily for her taste his meat.

Soon, Amy's head bumped into something. Able to move her head just barely, she guessed it must be Peach's cervix. She didn't have time to analyze closely as it immediately opened up, and another contraction sent her into a more open area.

"Her womb." Amy whispered. She knew without a doubt this was the royal womb. Once again though, she had no time to admire as clenched her eyes shut moaning.
Amy's waist was now grinding against Peach's birth canal as it worked her in. This was not like any sex with a woman Amy had experienced before. Aside from being unbirthed of course, the raw feeling of Peach's hot cunt drove her wild. Amy began thrusting her hips the best she could against the inner walls. Her own moans were loud enough, but Peach's although muffled by Sonic's dick shook the entire womb.
The vibrations were the last straw and Amy screamed as she mixed her cum with Peach's.

The hot splash from within sent Peach over the edge. Somehow she sucked Sonic even harder. Her tongue rampantly darted around every inch of that member quickened her pace. Finally just as her actions sent Sonic over the edge, Peach climaxed and pulled in Amy's legs with a wet "Squelch!".
Where Peach couldn't scream, Sonic did it for her as her surrendered his white treat to her hungry maw.