Steve went to bed right after dinner feeling uncharacteristically tired given he would normally play games before later going to sleep. Once in bed Steve almost instantly fell asleep drifting into feverish dreams of what had happened earlier in the day with Henry. The encounter kept replaying in the dreams but each time different and more erotic. The dreams went from Steve being forced to deepthroat Henry’s huge cock with the boy's inhumanly strong hands holding his head in place while he was on the changing table to Steve voluntarily kneeling to kiss and suck the massive cock as Henry sat on the changing table like it was his throne, worshiping his brother's organ. these dreams continued to shift and change with Steve committing different acts of subservience to the superhuman cock attached to his baby brother each one more erotic than the last. The dreams finally stopped after a version of Steve dressed in slutty princess outfit had given his anal virginity to the massive cock as Henry sat naked on a real throne with nothing but a crown on his head.
Steve woke when his dream counterpart had managed to get to the base of the huge cock, fully hilting the monster inside his boypussy in one swift motion. Dream Steve had immediately begun to cum which Steve woke up in a sweat. He threw off his sheets to see if he had made a mess certain that the feeling of orgasm he had felt in his dream was real given its intensity. After turning on a lamp and learning from his clock that it was 1 in the morning Steve looked at his crotch for the mess but found his pajamas dry but tighter on his waist than he remembered. 10 year old Steve had only recently begun to experience wet dreams at night, and was greatly embarrassed each time they occurred, scrambling every time it happened to hide the cum smeared undies from his mother.
Pulling them off himself, his pajama bottoms and underwear got stuck a little on his butt and hips but Steve didn’t pay too much attention to it. Now exposed Steve touched around to double check he hadn’t made a mess. Steve was still hard from the dream and his cock had a tiny bit of precum on its tip but that was all the mess he could find. The phantom orgasm from his dream was still fresh on his mind as he gently played with his 4 incher and his young balls. Without thinking about it Steve reached lower and a finger of his prodded his virgin hole. The feeling this caused sent flashes of the dream to play through Steve’s mind. Steve had clenched involuntary closing the hole tight off from the finger that had touched it. As Steve unclenched he wondered how his dream self had taken the massive cock of his brother when he was so tight that he wasn’t sure he could get a single finger in. Thinking back to his dream, he began to play with his small hardon while he prodded his butthole. Steven then tried to relax his muscles down there to grant him access and was able to slowly slip his finger into his asshole. The feeling of fingering his own behind was weird to Steve, but not all bad, and he continued to finger himself while stroking himself. With some practice, and a few calming breaths, he found himself not only able to loosen up the hole but actually able to open it up wide enough to fit a second and then a third finger in comfortably. With his three fingers in to his knuckle he involuntarily clenched again squeezing his finger tight sending pleasure throughout his body. Steve’s cock twitched building to an orgasm which he quickly jacked to completion, spurting out small dribbles of opaque watery cum that left him feeling less satisfied than it should have. Unknown to Steve the mutant load of cum he had been forced to swallow from his super serum infused brother had changed his body in his sleep. Now he couldn't be satisfied with himself like this, and he felt that he still needed release.
Steve slipped from his room as quietly as he could looking down the hall to his parents room which he tried to look into, but it was completely dark. Everybody was still asleep. Steve quietly slipped into Henry’s room and made his way to the crib. Slowly the diaper was removed from the sleeping Henry and the object Steve knew could grant him his release was exposed. The sight of the altered cock made Steve’s heart pound and his ass clench. Leaning into the crib Steve brought his face inches from his brother's new sheath, analyzing it intensely in the dim light, breathing in the intense smell of the freshly exposed cock. The cock was completely covered while it was still retracted into Henry's body in this way, and Steve could just barely make out the foreskin covered slit at the top in the dim light of the baby’s nightlight. Steve sorta knew what he was looking at, having observed a few horses the previous summer when his father took him to visit a farm, but it was still quite odd to see this oversized - almost leathery looking - organ attached to his baby brother. Steve needed to be sure, however, that it was still the cock he needed to feel relief, and so he reached down and gently stoked the organ to life. Reacting to his brother's gentle ministrations, Henry shifted about in his sleep as his cock slowly rose from its hiding place, but ultimately settled himself back to sleep, exhausted from events of the day.
Knowing there would be no going back Steve took the next step and went in to kiss the cock that he had been worshiping in his dreams. The kiss was gentle and demure at first with Steve only using his lips to give the head a few quick pecks but it rapidly devolved when Steve’s tongue came out and began to explore the inside of the foreskin licking all around the head. Steve tried to slip the head into his face again, only to be stopped by the width of his jaw. Steve still made out with the head of this object of his fantasies. being careful not to let his teeth scrape the head, he kissed it all about and licked in the foreskin and underneath the hood of his baby brothers infantile super cock.
The cock he had been dreaming of slowly expanded from its flaccid state, nearly reaching its full and impressive two foot erection. Steve continued to kiss an suck it as it grew not stopping when the foreskin was retracted, only switching focus to the expanding piss slit that he shoved his tongue into as if it was his lover’s mouth, tasting a salty mixture of piss and precum. He was impressed by how easily he could tongue his brother's urethra, being able to make out with this superior cock and deeply fuck inside it with his young tongue. Steve only stopped when it reached full mast so that he could look at its full size. Steve was certain beyond any reasonable doubt it was bigger than it had been when he had first encountered it and that thought made his heart pound harder and his ass clench in anticipation.
Steve needed to get that meaty pillar into his ass but that was easier said than done. Luckily Henry had a large crib and he was in the center of it. Clambering into the crib being carful not to wake the still sleeping Henry, Steve crouched over his brother’s massive cock lining it up with his bare ass. Using his odd control over his anal muscles Steve relaxed his hole as much as he could and dropped onto the cock. The warm head smooshed against the opening just too big to fit and Steve almost clenched up completely, but instead carefully reached around his round bubbly ass cheeks and slowly slipped two fingers from each hand into his butt, then carefully pulled himself apart. The feeling of scratching was uncomfortably for the boy just starting puberty, but he felt he needed to see this through, and with a strong resolve he spread his legs and crouched down over his baby brother's gargantuan cock, spearing himself on that spire of flesh as far as he could. Steve sank onto the cock taking almost half of the mighty shaft surprisingly easily. Steve felt like he could immediately orgasm from the pleasure of taking so much of the cock but he felt that he shouldn’t cum until he got this amazing cock to cum. He removed his fingers from his asshole and felt himself tighten down on his brother's cock, stretching himself immensely and filling his insides. hands still reaching behind himself, Steve stroked the remaining half of Henry's cock still outside of himself, before shifting his weight to lift himself up, and then sit back down, slipping even more cockflesh inside himself. He repeated this motion over and over, up and down, pounding his own ass on almost two feet of cock, slowly getting more and more cock into his poor stretched boypussy, his asshole beginning to get somewhat slick with juices as his body tried to help him earn his prize. It was a great effort for Steve but a rewarding one to ride the massive cock up and down slowly getting the rest of it into his impressive ass. Steve was at the end of his rope when he reached the base but saved when he felt Henry’s huge balls lurch underneath him foretelling of their imminent release permitting Steve to finally release as well. The two brother’s cocks came at the same time, one was far larger than the other, with Steve's humble orgasm splattering across the crib in a mere four creamy spurts while Henry came in massive waves that lasted for what felt like nearly an eternity, filling Steve with its hyper potent load till he swore it must be showing on his gut. Steve wasn't even sure how he had taken so much cock into himself, as he felt so stretched out around his brother's spasming erection that he thought he felt baby cock in his chest, making him feel warm and lightheaded and out of breath. He needed a minute to catch his breath and steady himself before he could get up, but he knew he had to be quick lest he wake is brother or his parents.
Carefully sliding off his brother's dick was hard with his asshole involuntarily clenching so tight he was sure he would wake his brother up, but Steve was pleasantly surprised when he felt the tip of his brother's cock slip out of his ass. Reaching around, he could feel that nearly none of this potent baby spunk had escaped his behind. Steve grabbed a few wipes to clean himself up, wiped his brother's cock off as the sleeping boy's penis retracted into is sheath-like mass of foreskin and cockflesh, then hastily threw a diaper back on his brother as quietly as he could, belly sloshing about the whole time.
Steve climbed out of the crib with his stomach slightly bloated from cum and Henry still miraculously asleep. Steve makes his way to the door to leave but when he was about to open it he froze when he thought he heard something coming from the other side of the door.