They don't know how long they had spent there. A few weeks, months, it was hard to tell. They were kept locked in that same room the entire time, never allowed to leave(unless Sonic had to use the bathroom, Shadow lost the need from not eating)

    They were hardly fed. Shadow gave his food to Sonic, he didn't really need it anyway since he fed off Chaos energy.

    The Black Arms hadn't touched Sonic since the first time. He had recovered slightly, but he didn't want to move most of the time. Shadow feared the worst. But he was really hoping that he was wrong.

    He had gotten his answer a few days later. Sonic had gone into heat.

    He squeezed his thighs together as he ate the meager food that was given to him. The dark hedgehog watched as he did so, wondering what was wrong with him. He had been restless the moment he woke up.

    The blue hedgehog continued to squirm around for a few minutes before giving up on eating. He set down the plate and shoved a hand between his thighs, hoping that would stop the weird feeling he had.

    He pushed his hand down into his crotch. That didn't help, it just made the feeling intensify. He let out a miserable moan and squeezed his legs shut tight.

    "Ugh... S-shadow... I feel... r-really weird..." Sonic shuttered as he spoke.

    Shadow analyzed him for a moment, taking in his behavior and the way his face was flushed a dark red. He was sweating, despite not moving. His eyes shut as he bit his lower lip between his teeth.

    The dark hedgehog's eyes widened as he realized what was happening.

    "Shit, you're in heat."

    As he said that, it was then he noticed how Sonic smelled. He smelled like the earth and rain, his natural scent, but with a hint of something... sweet?

    Shadow's alien genes made him unaware of mobian biology and he hadn't noticed before. And this was Sonic's first heat so he didn't know the signs of it either.

    "W-what?" Sonic was feeling a bit dizzy. There was pain laced in his confused expression.

    Thinking quickly, Shadow scooted closer to the other. He pulled off one of his gloves before spreading Sonic's legs open.

    "Shads! W-what the hell!?"

    "Shh, I'm trying to help, just relax..."

    "What do you me-" Sonic felt a finger run along his slit, causing him to moan. The finger teased his lower lips for a bit before slipping inside slowly. He was already really wet so the finger had no trouble wiggling its way inside. It went at a slow pace of pushing in and pulling out.

    Sonic sighed in content as the fingering replaced the uncomfortable feeling with pleasure. But it wasn't enough.

    "Shads~." The blue hedgehog whined. "Go faster."

    His mate complied, increasing the speed of his thrusting. After a bit, he added another finger, causing Sonic's hips to jerk at the sudden change. Shadow changed his pace from short and quick to slow, deep thrusts.

    "Ah, ah, ah, oh, wow... mn. That feels... r-really good." Sonic lifted his hands to clutch onto Shadow's shoulders, his short nails digging into his skin. He started rocking his hips in time with the fingers, riding them.

    "I-I think, I'm going t-to-" He tightened his arms around Shadow's neck, pressing his face against his shoulder. His hips jerked as he came, his breath coming out in short pants. A small gasp leaving him as he felt the fingers withdraw.

    Shadow kissed him on the cheek as he started to relax. "Are you alright?" He got a nod in response.

    'I just hope those assholes don't come back anytime soon.' The dark hedgehog thought with a grimace.

    Unfortunately, they did come back, with Black Doom trailing behind them. Though his face only had three eyes and nothing more, there was a smugness in his expression.

    "Hello again, Shadow." Black Doom spat his name like it was a curse. Shadow growled low and threatening in response. Black Doom only chuckled menacingly.

    Sonic, who had been sleeping in Shadow's arms, startled awake at the noise he heard. He opened his eyes blearily and took in his surroundings before recoiling in fear at the sight of Black Doom and the others. Their captor paid him no mind as Shadow tighten his hold on him.

    "Are you supposed to be frightening?" The alien lord mocked the dark hedgehog. "There's someone here to see you." He said in a mysterious tone of voice.

    Who could it have been? If it was any of Sonic's friends, they would have been captured or possibly killed. The only person Shadow could think of was-

    "Hello again, brother."

    Eclipse

    "What the hell are you doing here, you bastard!?" Shadow snarled.

    Eclipse only grinned at him. "Come now, brother. Are you not happy to see me? After I had come all this way to see you? I'm hurt." His fake tone of voice was accompanied by him placing a hand over his heart.

    The darkling walked over to him, looking over the hedgehog that was curling himself against Shadow's side.

    "Would you look at that... Poor thing is frightened. Whatever for?" He asked in mock concern.

    Shadow pushed Sonic behind him as Eclipse got close. "Fuck. Off." He growled.

    The alien prince just rolled his eyes. "As if you can do anything about it." Just to prove it, Eclipse punched Shadow in the gut, causing him to fall to his knees, clutching his stomach.

    "Shadow!" Came Sonic's concerned voice. He glared at Eclipse, who only laughed at him.

    "How cute! You're as scary as a kitten." The darkling said with a grin. He grabbed Sonic by the arm and pulled him to his side. Sonic tried to struggle out of his grasp to no avail. 

    "Let me go, asshole!" Eclipse gripped his chin and turned his head to face him. He leaned in, pressing his lips against the hedgehog's, silencing his protest. Sonic gasped, allowing Eclipse to slip his snake-like tongue inside his mouth.

    Shadow had barely recovered from the hit when he felt like he couldn't move. The bracelets around his wrists and ankles were glowing purple. Black Doom was holding up a hand.

    The fucker was using magic.

    "Ow, fuck!" Shadow attention was back on Eclipse, who had pulled away suddenly from Sonic. He backhanded the blue hedgehog, knocking him down.

    "The bitch bit me!" There was blue blood covering his tongue. He kicked Sonic in the side, making him flip onto his back. "Looks like I need to teach you a lesson."

    Sonic tried to crawl backward but was suddenly surrounded by Black Arms. They restrained him, holding down his arms. Eclipse spread his legs and kneeled between them.

    "...P-please... d-don't..." Came Sonic's broken sob.

    "Too late for that, princess." Gripping Sonic's hips, Eclipse thrust quickly inside him. Sonic screamed.

    "Sonic... no... please don't do this." Shadow felt warm liquid drip down his face. Was he... crying?

    "Oh fuck! This feels amazing. So tight and wet for me, aren't ya, you little whore?" Eclipse mocked as he pounded into the blue hedgehog. The pace was forceful and punishing, it hurt so much and he knew he was bleeding again.

    Sonic kept screaming until he screamed himself hoarse, sniffling and whimpering quietly.

    Eclipse laughed darkly, turning to smirk successfully at the kneeling hedgehog. "You hear that, brother? That's the sound of an obedient bitch learning his place!"

    The Black Arms released their hold on Sonic as Eclipse leaned over him. The darkling pressed little kisses against his neck before sinking his sharp teeth in his flesh. Sonic gasped from the sudden pain. He started feeling... really strange. It was starting to feel really good...

    Eclipse leaned away from Sonic's neck, watching his expression morph from terrified to blissful. The blue hedgehog held onto his shoulders as he started moaning.

    "Ah, ah, ah, Eclipse~ It feels really good! W-what did you do?" He managed to ask between moans.

    "Don't worry about that, darling~ Just lay back and enjoy it..."

    Eclipse could feel his orgasm approaching and slowed down a bit, thrusting slow and deep. He could tell Sonic was close too. 
    
    "Eclipse~ I'm g-going t-to-"

    "Let go."The alien prince whispered in his ear. Sonic came with a silent cry. Eclipse thrust a few more times before spilling himself inside of Sonic.

    The darkling gave him a second to relax before turning on his side and resuming his pace.

    "I'm going to breed you till you're unconscience~"

    Shadow had to watch as Eclipse took Sonic in multiple positions. At least eight or nine times before the blue hedgehog couldn't take it anymore and passed out.

    "Well, brother. Looks like fun times over." Eclipse purred. Laughing at Shadow's devastated expression. He moved over to where he left Sonic, laying in a puddle of white liquid. "Oh, and I'll be taking this if you don't mind..." He picked up Sonic and started walking away.

    "No, you can't take him from me!" Shadow yelled desperately. "Please, don't...." He knew it was useless. There was nothing he could do like this.

    It was only till after Eclipse had left the room with Sonic, that Black Doom had finally released him.

    The alien lord left without a word, his army following behind him.

    Shadow didn't move from his position on the floor. He had thought that maybe, just maybe, they had a chance. They would be okay somehow. Sonic... they took Sonic and left him here. They should have just killed him.

    But that would be the easy way out, wouldn't it?