Dean smelled his sleeping brother's long, auburn locks. He had always enjoyed watching Sam sleep. Dean planted a kiss on the younger brother's forehead and ran his fingers down Sam's cheek. His eyes sparkled in the moonlight as he whispered, "I love you." With that, his cock hardened like a ready to evolve Metapod.
Sam awoke to the sound of his brother's erection. His eyes widened with confusion and he ripped off the covers, inviting Dean into his bed. "Take me now!" he pleaded. Dean bowed to his brother's crotch and took down Sam's Star Wars boxers with his teeth. Sam's penis was also Metapod hard. Dean pushed Sam onto his stomach and inserted his pulsating, condomless manhood into the boy's willing anus. Sam screamed in pain and ecstasy and Dean realized he had forgotten to lubricate. Sam was tough; they had done this before.
Sam gabbed onto the mattress, bracing himself while Dean rode him. Sam grunted and felt himself cum into the Hello Kitty bedspread. His knuckles went white. Dean kept grinding. His breathing was heavy, like an anvil. He kissed Sam's back, continuing down his spine and whispered, "yeah." Sam grunted again in reply. The older brother was ready to climax. "I'm gonna cum all over your ass!" he bellowed.
A Supersayan groan escaped Sam's lips. "Yeah!" Dean shouted, spraying all over his brother's backside. All Sam could think about were all the potential babies they could've made, had one of them been female.