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 while he was on the changing table to Steve voluntarily kneeling to suck and kiss the massive cock as Henry sat on the changing table like it was his throne. It continued to change with Steve committing different acts of subservience to the superhuman cock attached to his baby brother. 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 on a real throne with 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 boipussy. Dream Steve had begun to cum when Steve woke up and he threw off his sheets to see if he had made a mess. 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 than he remembered. They got stuck a little on his butt and hips when he pulled them off and so did his underwear 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. 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. Steven then tried to relax his muscles down there to grant him access and found himself not only able to loosen up the hole but actually able to open it up gaping himself wide enough to fit a finger in and not even touch the walls. With his middle finger 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 but he somehow knew he would need something a lot bigger than his finger to get there. 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.
Steve slipped from his room as quietly as he could looking down the hall to his parents room but it was completely dark everybody was still asleep. Steve 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 flaccid cock made Steve’s heart pound and his ass clench. Leaning into the crib Steve brought his face inches from the tip, breathing in the intense smell of the freshly exposed cock. The head of the cock was mostly covered by foreskin and Steve could just barely make out the slit at the top in the dim light of the baby’s nightlight. 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.
It was at this point that the cock began to stir, slowly expanding from its flaccid state. 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. Steve only stopped when it reached full mast so that he could look at its full size. Steve thought it looked bigger than it had been when he had first encountered it but the thought only made his heart pound harder and his ass clench in anticipation.
Steve needed to get that meaty pillar into 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 widened 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 with a supreme force of will he remained open and after a second of pressure the cock plunged in. Steve sank onto the cock taking more than 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 the cock to cum. 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 and Steve finally released as well. The two brother’s cock came at the same time but one was far larger than the other.
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.