Over the last couple of days, Sonic has been concerned with his buddy Tails. Whenever he takes a break from his workshop or stopping whatever Eggman has planned for the week, the two tailed fox says he goes somewhere to relax and unwind. 
It happened way too frequently too. Amy just chalks it up as Tails growing up and gaining independence while Knuckles thinks that maybe it was just hormones kicking in and the fox acting all grown up.
Sonic brushes it aside and takes that explanation for now. But he couldn't help but be worried about Tails. Late one night, Sonic was asleep on the couch, snoring away and dreaming about running fast in some field somewhere, along with his two tailed friend, Tails. 
However, something odd began to happen, the fox pushed Sonic down on the grass and mumbled something that he couldn't hear, and then started to ride him. The blue hedgehog was confused, what was his friend doing?! And... why does it feel like it was actually happening?
Sonic opened his eyes, his vision blurry as he could faintly hear some moaning and the slapping of something. Once he blinked and focused his vision, his eyes widened at what he saw. Or rather, who he saw. There was the two tailed fox, still wearing his shoes, gloves and goggles. But on his body was writing with markers.
Words like 'SLUT', 'CUMDUMP', 'FREE BOOTY', 'WHORE' and what really shocked Sonic was 'SONIC'S #1 FEMBOY'.
"Wh-what the hell?! Who wrote all of this crap!? And why is my lil' bro...?!' It didn't make any sense! 
Sonic groans, feeling his erect cock feeling pleasured by Tails' tight ass. The fox boy turns his head and smiles. "Evening, Sonic...! Mmhhf... O-oh wow... your dick's so good...~" Tails says, acting like this was perfectly normal and he wasn't just fucking his older adoptive brother.
"Nngh...! T-Tails...! Wh-what the hell are you doing?! What is all of this!?" Sonic cried out, watching as the feminine fox bounced his plump fat ass on his hedgehog dick. The sounds of slapping echoing in the house along with his quiet moans. "Mmm... what does it look like? I'm giving my big bro what he really wants!~"
Sonic was even more confused and horrified, how could he even want something like this?! He viewed Tails like a true brother, a friend for life! Not some... some cheap whore he could use! "Tails... nnhg... i-is this what you've been doing all this time...? And those writings on your... your butt..." He blushes, feeling so ashamed to notice that.
"Mmmm... my friends have been kinky lately~ Don't worry Sonic, you don't have to do a thing! Let ol' Miles 'Tails' Prower do the work!~" The fox giggles and gives him a wink, resuming his riding. As much as Sonic hated to admit it, the fox had grown up to be quite cute and handsome.
His boyish looks, his cute girly voice that hadn't hit puberty yet, and that fat ass riding and slapping on his cock and chest. The hedgehog felt so dirty for thinking these thoughts as he watched Tails riding him like a pro.
'I... I can't think of him like this! He's my lil' bro! But... o-oohh...! Wh-why's his ass feel so good and soft...? Has he always been this soft before?' Sonic felt so conflicted, he should hate this, push Tails off and find out who these 'friends' were. But... he couldn't. He just lied there and let Tails do his thing.
Tails just moaned as he continued moving his hips, feeling his idol's cock inside of him. "Mmmhf... fuck, you have no idea how long I wanted to do this with you, Sonic~ I've always admired you and think you were so cool and handsome... still do, ehehe~" Tails admitted, causing the blue hedgehog to blush.
"Lemme speed things up, I know how you are, can't sit still and all..." The two tailed femboy sped up his movement's, causing Sonic to groan and grip onto the couch for support, as if he was afraid he would fall off. The sounds of flesh against flesh was heard inside the house along with Tails' slutty and cute moans.
"Oooohhh, God...!~ Sonic, you have the best cock right now!~" The poor hedgehog could only pant and moan, watching as the boy who idolizes him began dominating his dick. "Aaaah! Aaah! T-Tails!~ Tails!!~" 
Without even thinking, or maybe it was some sort or primal instinct, Sonic grabbed his friend's waist and pulled him close to his chest, moving his hips and thrusting inside the two tailed boy's anus. Tails squealed with pleasure and stared at Sonic with lust. "Aaahn!~ Yes!~ Fuck me Sonic! Fuck me right up!~ Use my fox bussy!~" He moans, not caring he sounded like a desperate whore.
"Mmmhg... T-Tails...! I-I can't help it... You grew up to be so cute and sexy...!~ I'm sorry...!" Sonic says and grits his teeth, holding the fox close as Tails just moans. "D-don't be...! This feels amazing!~ More!~ Go faster!~" The hedgehog speeds up as Tails' eyes are half lidded in pleasure, he turns his head and starts kissing his hero.
'He-he's kissing me! A-and I'm kissing Tails back while fucking him! This feels... this feels awesome, actually!~ Oh wow... he's a natural!~' Sonic stares at his friend with half lidded eyes and began making out with the fox. The sounds of slapping and moans could be heard.
Neither knew how long they went for, but by the time they broke off the kiss for some air, Tails and Sonic began to get close, leaking pre as the hedgehog sped up once again. "Mmmm...! I'm gonna cum, buddy...!~" Tails' eyes roll back as he groans loudly. "Do it! Cum inside me, Sonic! I want your hedgehog jizz in me!~"
With one final push, both boys moan loudly, Sonic cumming and filling up the two tailed femboy fox, while Tails blows his load, staining his chest and face. They kissed again as Sonic pulls out, his semen leaking out of the fox's used hole.
Once they pulled away again, both males were panting as Sonic just processed what happened. He really just had sex with Tails, whom he grew to love as a cherished friend and little brother. And yet... it was the most amazing experience ever!~
"Oh God, Tails... that was... awesome...~" Sonic says, catching his breath, Tails just chuckles and gives a mischievous grin. "Oh, it's not over yet~" The fox replied and adjusted himself, facing Sonic's erect cock while pointing his own at Sonic's face, the hedgehog realized what he was up to.
"Ready?" Sonic nodded and the two opened their mouths, taking their lengths inside and began sucking each other off. The sounds of moaning and slurping could be heard. Tails obviously has the more experience as he sucks off Sonic's cock like a pro. The hedgehog moans and gurgles, feeling the thrusts of the fox's manhood inside his throat.
Tails bobs his head and swirls his tongue, closing his eyes as he fully concentrates on pleasing and milking Sonic's cock, tasting the leftover cum from the last session and gulping it down like it was a regular drink. Meanwhile, Sonic tries his best and closes his eyes, focusing on pleasing his horny friend.
'Oh, wow... his cock tastes so good... Why haven't I done this with Tails for so long?! I've been missing out on this! He's amazing!~' Sonic thought to himself and moans, the two continued at it pleasing each other. They began to go deeper and faster, gurgling and moaning around each other's lengths.
Tails' namesake was swishing back and forth in happiness and excitement, finally doing it with the person he grew to love and idolize for so long. A blush on his cheeks appeared as he deep throated the blue blur's cock. Sonic was enjoying every second of this and never wanted this to end! He felt like such an idiot for never doing this.
After a while, Tails and Sonic began tasting each other's pre, getting closer to orgasm. Finally, the two boys moaned and filled each other up. Tails gulping it down and blushes a deep red, while Sonic swallows and blushes, having never done it before.
The two pulled away and gasped for air. "Pfha...! Shit Sonic... you taste so good~" Tails says and giggles, licking his lips. Sonic chuckles and watches his two tailed friend get off of him and stand up. "Same to you, Tails... holy hell..." He panted out, he then felt Tails' hands grab his own and helped him up.
"C'mon... I wanna take you somewhere." The two tailed fox led the hedgehog outside and going through the jungle area. Sonic has a feeling his friend was leading him to his other 'friends'. As the two made their journey, Tails suddenly stopped and pinned Sonic against a tree, which he held onto in surprise.
"T-Tails...?!" Sonic gasped and felt the fox's hands around his rump, groping him. "Don't think I'm the only one enjoying this~ I wanna let you feel the same too~" Tails says and buries his face into the hedgehog's ass, rimming him. Sonic couldn't help but moan and feel his cock spring to life, throbbing and erect while he felt Tails' tongue against his anus.
"O-oh, God... Tails...!~ Mmmhf... y-your tongue against my... a-ahhh...~" Sonic has never bottomed before in his life, but he didn't lie, he did have some lewd fantasies like this happening to him one day. He didn't think it would be tonight and outside with his best friend. Tails just kept licking Sonic's taint and eating him out, even giving his ass a spank for good measure.
"Aaah!~" Tails chuckles hearing his friend's yelp from the smack. He then pulls out and stands up, erect cock at the ready as he held Sonic's waist, the hedgehog holding the tree for support as he feels like he's going to be here for a while.
"I think you're ready for the real thing, Sonic~ Let's do this!~" Tails says and shoves his cock inside, both boys moaning as Sonic shudders. He felt the fox's hands around his waist and the movement of his hips. "Oh fuck, Tails!~ Nnhgh...!~ Y-your dick's inside me...!~"
Tails laughs at this and watches as Sonic pants and moans, feeling the fox's thrusts. "This is like a dream come true...! Your ass feels awesome Sonic, just like you!~" The femboy fox gives the hedgehog's ass a slap, making him yelp again and groan. "Y-yes..!~ Please hit me again, Tails...!~" He does so, again, and again, and again.

Hand prints on his ass cheeks are faintly visible. Tails lifts Sonic's leg and shoves his cock deeper inside the blue blur, thrusting faster. Sonic's eyes were half lidded in pleasure as he pants and moans as if he were in heat just like Tails. "Aaah!~ Ohh!~ Oh, fuck!~ Fuck my ass Tails!~ My ass feels incredible!~ Keep pounding me!~"
Tails leans closer and whispers into Sonic's ear, making him shudder. "Then you're gonna like where I'm taking you, Sonic~ The place is gonna give you this and more~ Wanna be a cumdump just like me?~" He says softly, Sonic's mind was spinning, he could have more like this? All the time? And still be with his bestest bud?!~
'M-more dicks... more cum... b-be with Tails...!~ I... I...! I...!!' He finally made up his mind and swallowed his dignity, his tongue lolling out as a blush painted his cheeks. 
"Yes!~ I'll be a cumdump!~ I'll be a cumdump with you Tails!~ I can't wait to have more cocks and cum inside my hedgehog mouth and bussy!~" He shouted, not even caring if anyone caught them anymore.
Tails smiles and thrusts faster inside his friend, who now turned into a moaning and slutty mess like he was. "Good answer, buddy!~ I'll give you that cum you want!~ I'll cum into your bussy nice and good!~" All the hedgehog could do was moan happily, his cock twitching and leaking pre like a faucet.
"Yes!~ Cum in me!~ Cum in me Tails!~ Fill me up!!~ I can't wait!!!~" The two tailed femboy fox thrusted as hard and fast as he could, until finally, he groans and unloads his seed inside the hedgehog. Sonic's eyes roll back as he howls with pleasure, his cock spurting his load and staining the grass.
"YES!!!~ CUMMING!!!~ I'M GETTING FILLED BY TAILS!!!~" He screams, not caring if anyone heard his declaration. Tails pulls out and lowers Sonic's leg, staining his ass with more of his cum. The hedgehog went on all fours, presenting his ass to the two tailed fox.
"Hahh... please... again...~ Fuck my ass again, buddy...~ One more round?~" Tails smiles and laughs, plunging his cock back in and hearing his friend's slutty moans. "Sure Sonic!~ I'll fill you up again with my cum!~ Just for you!~" Throughout the jungle, all you could hear was the slapping of flesh against flesh and moans like wild animals.
[...]
After their little session, Sonic was made a member of the Lightning Bolt Society as another cumdump joining Tails, and right off the bat, they were presented with a horny group of males, eager to have a round with the two boys.
Tails was lying on his back, using his hands, tails, ass and mouth to please their cocks. Sonic was on all fours stroking two males and getting spitroasted by two others. 
From the sidelines, Dave, Wily and the Weasel Bandits watched with amazement and arousal, seeing the local here of Nowhere Island reduced as a slut like his two tailed friend. "I never doubted him to begin with but, damn...! He actually did it!" One of the weasels piped up as the others chuckled.
"Yeah, that fox is special alright. How's about we join in after our fellow brothers are done?" Dave suggested as they agreed. The rest of the event went on like this. Tails and Sonic were put in a stockade, this time with Sonic's turn with writing on his ass.
'FALLEN HERO', 'HEROIC FAGGOT', 'FEMHOG' and 'TAILS' #1 SLUTTY HERO'. Sonic was having the time of his life, sucking and taking cocks left, right and center. The two heroic sluts moaning with pure bliss.
One other event was Sonic and Tails hanging off the ground with a harness, their arms and legs bound so they couldn't move. Sonic was on his stomach as two males fucked his ass and mouth while Tails was upside down and on his back, spitroasted by two others.
Sonic and Tails eagerly swirled their tongues, helpless to do anything as their cocks twitched with want and need. Eventually, after an hour, the members filled them up once again, just in time for Sonic to cum all over his chest and Tails spraying his on the floor.
By the time the whole event was over, the hedgehog and fox were given their own room with a bed fit for two or maybe more people. Their fur covered in cum, piss and various other fluids, and they were playing with a double ended dildo while kissing each other.
Sonic and Tails have no intention of leaving. They've made their new lives here and felt so much happier. The hedgehog and two tailed femboys stared at each other with lust, hearts in their eyes as their minds finally broke and gave in to pleasure.
"I love you, Sonic the Hedgehog,...~" Tails says softly and strokes his hero's cheek. Sonic returned the gesture and smiles. "And I love you, Miles 'Tails' Prower...~" They kissed once again as they both came, staining the sheets of their new bed. Thus, Sonic and Tails' lives as the Society's cumdumps... truly began...~
THE END