Sam was 14 when it first happened. Pressed close to his brother, rutting against him and clinging tightly like it was the only thing keeping him from floating away. After being flipped onto his stomach he lost all train of thought. It was a blur of bruises, scratches and the vulgar slurping sounds of Dean wrecking his tight virgin ass with his tongue. Between the feather light kisses and the burn of being stretched wide by Dean's sinful mouth, Sam lost control and came hard, painting the threadbare sheets for the third time that night. Dean lost it too, spurting his load directly down his thighs as Sam's beautiful peachy hole clenched around his tongue. Wanting to share the addicting taste, Dean kissed Sam's greedy cocksucking lips.
Curled up against each other, both boys fell into a blissful slumber with a silent "I love you" falling from their mouths.
When Sam turned 15, Dean had promised him a night that would ruin anyone else for him and oh boy did he come through. With his legs hooked over Dean's shoulders and his head banging against the headboard continuously while Dean was three finger and knuckle deep inside him. Sam pondered if it got any better than this. He soon found out.
Dean repositioned himself and pushed his hard, almost painful cock against Sam's stretched pucker.
"i don't want to hurt you, baby boy." Dean reassured Sam, running his hand gently over his already muscular belly. Sam swallowed and stared at Dean with a look Dean had never seen before. A look that was mixed with nerves and lust. "relax, little one" Sam nodded slowly and twined his fingers with Dean's, pulling back so his hand was pinned under Dean's weight, granting Dean entrance without a word ever leaving his saliva slicked lips. Dean locked eyes with him and pushed his way into the tight, wet hole. The heat was almost to much to bare, nearly sending Dean spilling inside his not so innocent brother with one thrust. Sam was surprised how little it hurt. Sure, the initial sting of Dean's thick cock stretching him was painful but once Dean's heavy balls rested softly against his backside he relaxed completely, letting the feel of being full of his brothers cock take him into the most powerful orgasm his small body had ever experienced.
Over the next few years, nothing changed. Hot summer nights were filled with Dean buried balls deep inside his beautiful brothers body while Sam groaned, head pressed into the thin pillow by Dean's hand, fingers curled in his sweat soaked hair. Snowy winter nights were spent spooning under the covers, coming in unison after hours of slow, sensual sex, soft moans falling from both their lips and a mix of "Sammy" and "Dean" breaking through the crisp air.
Now, Two months after Sam's 24th birthday, the tables have turned. Almost 6 inches taller and a fair bit broader than Dean he had the upper hand by strength alone. Dean was bent over, spread eagled on top of the rickety motel table. Sam was the one buried inside of warm, tight heat. He averted his eyes down and watched his cock appear then disappear inside of HIS sluts raw hole. Dean, on the other hand, cussed and moaned, begging for more, begging for it harder and deeper, begging to be bruised and wrecked by his brother. Through the sound of skin slapping against skin and Dean's nails scraping against wood, Sam groaned loudly, filling Dean with the second lot of come in three hours.
As his mind went to the blissful state of post orgasm, he silently thanked his lucky stars that he had this kind of fucked up relationship with the one person he loved the most.