Desmond felt his chest tighten as he entered his brother's old room.  Devon didn't leave on bad terms, on the contrary he left home with his family's blessings. However,   he left Desmond in the dark until he realized that his brother left for good.
As for his reason he had come into this room? Devon had mailed them an invitation to a wedding. His wedding.  In the years he had been gone, Devon had finally decided to settle down with one of his close friends. It was of no surprise to Desmond, but there were some feelings he had to come to terms with before he could accept anyone else having his brother.
If there was one secret Desmond had it was that he loved his brother. Far more than a sibling should love their older sibling. Even now, thoughts of his brother roused a shameful reaction from him. But it was those feelings that brought him here. For his brother's happiness, he would have to come to terms with his feelings and bury them.  They were brothers, and to wish for anything more is to perform an act against nature.
As he walked amongst his brother's things, memories of happier (at least to him) times came to mind. A bottle of sand from their trip to Mareal...a photo of the two of them on a sled...an MVP trophy from Devon's division with a picture of the two siblings on the field...a photo of the two brothers during Devon's graduation...
"How could I wish to taint these happy memories?" He asked himself. To Devon, these were wonderful moments with his baby brother. But Desmond's desires bastardized those pure moments, and it hurt him.
Unable to keep standing, Desmond let himself fall onto his brother's characteristically messy bed. He turned his head to the sheets and breathed in his brother's comforting scent deeply.
"This bed is..."
Thoughts of Devon hiding under the covers with his hand around his shaft made Desmond's pants tighten.
"I'm horrible..."
He reached down and began to massage the bulge in his pants. In his mind, he imagined that the hand currently fondling him was not his own, but that of his brother.
"Devon..."
He pulled down his zipper just enough to let his cock out.  In his head, he could picture his brother's face. Wrinkles now marked his stubbled face, a downside of the trauma he suffered years ago. But despite that, his brother's smile was still the same charming one he's always had.
Desmond began to mouth, imagining his brother's lips on his as he stroked himself. He let out a groan as he tightened his grip.
"Devon..."
Lust began to cloud Desmond's thoughts, prompting him to pull down his pants to his ankles and lay on his stomach. He took his brother's pillow and placed it beneath him, his dick trapped between the pillow and his body.
"D-Devon...!"
He buried his head into the sheets as he started to grind against the pillow. He could feel his head slide against his abdomen, the sensitive bottom teased by the cotton covering. He imagined himself being held by his brother as he grinded against him, his mind turning his own moans into his older brother's. Desperate for more stimulation, Desmond reached back and rubbed his middle and index fingers against his entrance.
"Aah..."
The digits slid in with little effort, his constant fingering having finally proven useful. As he buried his fingers inside, he could feel pre ooze from his tip and stain the pillow.
"O-Oh Devon..."
With both his front and rear being pleasured, Desmond surrendered himself to the bliss. His soft insides tightened around his fingers, clinging to them as they would Devon's. The teen's moans rang loud as he played with himself, his mind lost in the fantasy of his brother.
Desmond could feel the heat building in the pit of his stomach. With care to the wind, he let himself get pushed to the edge.
"D-Devon!!"
His body went rigid as he came. His cock pulsed against him as it emptied itself in the gap between Desmond's body and the pillow. His hole quivered as he rode out his orgasm, his fingers close to impossible to remove due to the sheer tightness.
As the pleasure died down, shame took its place. Desmond couldn't help but sob into his brother's sheets.
"I'm sorry, I'm sorry for being such a terrible brother..."
"Desmond?"
The teens eyes widened with surprise as he heard that all too familiar voice. Slowly, he lifted his head up and looked towards the door.
"De...von..."
His older brother stood there, confusion written all over his face. Realizing what his brother possibly witnessed, Desmond geared up again.
"I...I..."
"Umm..." Devon cleared his throat, "We'll talk about this later."
The elder brother awkwardly excused himself and shut the door behind him, leaving Desmond to wallow in his own shame. Shame over what he did, but even more for the fact he was aroused over being caught.
"I really am a terrible brother..."