Slowly, but surely, he stirred. His thoughts gathered and his senses returned. Sonic roused from unconsciousness. Feeling a strange sensation as he did. He tried to move, but found that he couldn't. He felt something on his wrists and ankles. Restraining him. The sensation that he felt quickly became more clear to him. It felt...pleasurable, yet somehow painful? His eyes quickly flew open as he shot awake. He looked and saw her. A female hedgehog with black and white fur. Dreaded realization began to sink in.
Terios. The prototype to the ultimate lifeform. A terrible menace that Sonic and his friends have had to battle against, and now Sonic was being held captive by her. Cuffed helplessly to a slab while she sucked on his dick. She squished her massive breasts around his shaft while greedily sucking on it. Tit-fucking him and sucking him off at the same time. She was aggressive. Like a desperately starving wolf that had just found some juicy meat. Before he could even say a word, Sonic already felt himself nearing climax. 
"Hnngh!" Sonic could only tense up with a yelp as he came in Terios's mouth. She greedily drank his seed before pulling away to let the rest of it squirt all over her breasts. She hungrily licked her lips and looked upon his soft, effeminate body. There was a curve to his lower body. He had wide hips and a big, squishy bubble butt. The figure of a delicious femboy that drove her wild with lust.

"Finally awake? Good. It'd get boring if you slept the whole time." Terios said with a sly giggle as she seductively crawled up over his captive body. 
"L-let me g-Mmmm!" Sonic's sentence was cut off when the protohog suddenly pressed her lips to his own. He tried to move his face away, but she gripped the sides of his head and held him in place as she forced her tongue deep into his mouth. Terios wrestled with his tongue and explored the inside of Sonic's mouth so hard and sensually, that the sheer sensation made his mind fuzzy. He barely registered when she finally pulled away from him. The blue hedgehog only panted with his tongue out. His cheeks blushed a bright red. The sinister protohog only gave him a moment to catch his breath before she pressed her massive tits into his face. Smothering him. Her breasts were so large, that his head nearly disappeared into them as they squished all around him.
"Let you go? No my sweet hog. You're not going anywhere. I finally got you exactly where I want you.~" Terios mused as she squished her tits tighter against his face with her hands. 
"And you're not leaving until you accept that you're mine. All mine"

After saying this, Terios pulled her tits away from his face. However, Sonic only had a moment to breathe before he was suddenly buried under Terios's ass. She moved to sit on him so fast, that the blue hero didn't even have time to see it happen. The protohog's ass was so gigantic, that his head almost got lost in it. Terios wasted no time. She pressed her breasts around his still erect cock and began to suck on it. Sonic struggled against her, but he felt much weaker than he did mere moments earlier. Terios had wasted no time draining his energy, his cock and face covered in black veins and every single inch of his body was hurting madly. She viciously sucked him off. Marvelling in how Sonic was still rock hard despite all the sex and energy draining so far. That was one of the things that Terios loved. Sonic was the only one that could survive her draining, and recover quickly. It made them such a perfect fit for each other. 
"Mmmm!" She moaned as she felt Sonic eating out her pussy. It looked like the blue hedgehog was finally starting to surrender.
Terios lost track of how long this went, but eventually, she felt herself reaching her peak. She could feel his dick swelling in her mouth. Reaching his own orgasm. They both climaxed together. Her vaginal fluids splashed all over Sonic's face while she greedily gulped down heavy loads from his dick. She took a moment to savor her last gulp before finally pulling her fat ass away from Sonic's face. He immediately sucked in lungfuls of air. Terios licked her lips as she saw that Sonic's dick was still erect. She quickly spun around, grabbed his dick and aimed it at her drooling pussy. 
"N-No..." Sonic begged. He was at his limit. 
"Yes!" Terios answered before sinking her pussy down until his dick  was balls deep.
 "Oooooh!" The protohog moaned as she immediately started riding her helpless victim in the cowgirl position. Sonic, weak from her energy drain, could only whimper helplessly as she had her way with him. Up and down, up and down. Every downward thrust slammed her ass down on him so hard that the slab that Sonic laid upon rocked and creaked. Sonic's big, thick cock stretched her pussy wide. She squealed with delight from the feeling of it filling her. The feeling of the fat veins pulsing against her inner vaginal walls, the fat tip repeatedly knocking at her cervix. It was a truly perfect slab of man-meat.
Sonic was helpless. All he could do was grunt and twitch under her. He felt himself getting weaker by the second as she continued to drain him. Despite everything though, he couldn’t help but get lost in the pleasure himself. Terios's wet pussy squeezed him hard, stroking and sucking his dick with every rise and downward slam of her hips. He couldn't help but moan along with her. 
"Mmmmm! Ah! Yes, my cute pet! Come with me! I'm close!" she groaned as she grabbed and squeezed her own tits. Fondling them as she picked  up the pace. Slamming down harder and faster. She could feel his manhood swelling thicker inside of her. He was close too. They both screamed as they climaxed together. Sonic's hot seed erupted inside Terios like a volcano. Heat quickly filled her belly as her womb was filled beyond maximum, and beyond. Cum drips out of her pussy and puddles beneath them. 
Terios took a moment to catch her breath before letting out a long, contented sigh. She giggled as she traced a finger across the cheek of the weakened hedgehog's face. 
"Good boy. Be sure to get a good rest for now, because we'll be doing a lot more of this later!" she declared in an increasingly manic tone. Sonic groaned. 
"No, please, no more." he begged. Terios merely giggled again.
"Oh yes, we'll be doing this at least three times a day, every day. Until you finally break and become mine! Forever!" she said before laughing maniacally and licking Sonic's cheek.
Suddenly, one of the walls of the room shattered. raining broken debris all over the room. It was as if there had been an explosion. 
"What in the-!!!" Terios stopped mid-sentence when she suddenly found herself staring into the most furious green eyes she had ever seen in her life. It was as if the enraged glare pierced right through her, and gazed into her very soul. All just from the sheer anger of them. They belonged to a familiar pink female hedgehog, Amy. She gave Terios the most flaming death stare while brandishing her hammer that she had just shattered the wall with.
The pink hedgehog let out a ferocious scream as she immediately lunged forward with speed that was almost as great as Sonic's. Propelled by the rage of the moment. Terios could only let out a yelp before she was knocked hard in the head by Amy's hammer. The protohog crashed onto the ground hard. 
"Sonic is MINE!" Amy screamed out loud.
As everything went black, Terios had one thought before she went unconscious.
"Another time then."