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Bruce had been injured on patrol earlier in the night. Nothing serious, but bad enough that Alfred ordered him to stay on bed rest for the next 24 hours to give his body time to recuperate. Bruce had reluctantly agreed, said goodnight to Tim, then retired to his room. Tim tried to go to sleep soon after, but ended up laying in bed wide awake.
Seeing Bruce get hurt always left Tim feeling a little rattled, like the rug could be swept out from under him at any moment. He had already lost Bruce once when the man had gotten stuck in the timestream. Tim didn't think he could survive experiencing something like that again.
Tim laid there for hours before he accepted that sleep would not come while he was so anxious about Bruce. The plan was to quickly peek into Bruce’s room, confirm that he was still there and resting, then go back to bed and try to actually fall asleep this time. As Tim approached the door to the master bedroom, he tried not to think about what he would say if Bruce was still awake. Or worse, what he would say if Bruce was asleep but Tim’s spying woke him up.
Tim slowly twisted the doorknob and pushed the door open just enough for him to peek through the crack that was formed. The room was dim, but not entirely dark like Tim would expect if Bruce was sleeping. He could see the edge of Bruce’s bed and one of his legs, bare and laying above the covers.
Tim tensed, waiting to see if the leg moved or if he could hear any sound to indicate whether or not Bruce was still awake. When nothing happened, Tim risked inching the door open even further. More of Bruce became visible and Tim almost gasped when he realized the man was naked. He caught himself just in time, staying rigidly still and quiet while he took in the sight before him.
Bruce was laying on his bed completely nude, legs splayed out to either side and junk on full display. Tim was shocked at the possibility that Bruce slept in the nude, a habit he had never been aware of before and one that seemed out of character for the man, when he caught sight of movement on the bed.
Bruce’s hand moved to his cock and stroked it, and Tim heard a soft sigh echo throughout the room. Not only was Bruce wide awake, he was masturbating. As Tim processed this information, he became increasingly aware that he needed to close the door and go back to his own room before the other man noticed something was amiss.
But Tim felt rooted where he stood, eyes locked on Bruce. The older man was still stroking himself slowly, laying flat on his back with his eyes closed. Tim felt a thrill of excitement course through him at the sight, followed by an overwhelming wave of shame. What was he doing? Tim was pretty sure spying on your adoptive father masturbating was ranked high up on the list of ‘creepy things you should never do’. He didn't even want to think about how disturbing it was that he was getting hard in his pajama pants.
Tim was distracted from his thoughts by a low moan from Bruce. The man had started to stroke his cock faster, his hips jerking up into his hand. Tim was mesmerized, studying every detail of Bruce's body. He had seen the man in various states of undress before, but never fully naked and never in a state of arousal.
Bruce was objectively a very attractive man. He was tall and muscular and, apparently, he had a huge cock. Tim cupped his own dick through his pajama pants, thinking about how much bigger Bruce would feel under his hand. Tim pictured wrapping his hand around Bruce's cock and jerking him off the same way the man was doing to himself. He wondered if Bruce would like the idea of Tim touching him.
Tim slipped his hand beneath his waist band and gripped himself. He started stroking in time with Bruce, covering his mouth with his other hand so no noises would accidentally slip out. Bruce, on the other hand, started to get louder. His hips thrust up into his hand harder and the rough motion shook the bed. Tim could swear he heard the man murmur ‘oh fuck’ under his breath.
Tim felt his orgasm creeping up on him already. He would feel embarrassed about it if he wasn’t already doing something too mortifying for him to think about. He stared at Bruce while he humped eagerly into his hand, committing the sight of Bruce’s hard, leaking cock into his memory.
Tim’s orgasm hit him like a freight train, every muscle in his body seizing up as his cock spurted cum into his pajama bottoms. Tim bit into his hand, desperately trying to muffle his heavy breathing. His face felt hot and sweaty and his pants were now sticking to him uncomfortably.
Tim knew he should go back to his own room now. He had gotten lucky that Bruce still hadn't noticed him, but he couldn't count on that luck to last forever. If Bruce caught him spying now, flushed and sweaty with a large stain on his crotch, Tim was pretty sure he would die on the spot.
Despite this possibility, Tim didn't move. He watched as Bruce’s breathing got heavier and his hand stripped his cock at rapid speed. Tim saw the exact moment Bruce orgasmed, his cock shooting ropes of cum onto his abs. The man was shockingly silent, making no sound outside of his heavy panting.
When he was finished, Bruce dropped his hand to his side and laid still in his bed, his chest rising and falling the only movement still visible. Tim stared at the puddle of cum pooling on the man’s abdomen. Without Bruce making noise, the room was eerily silent. Tim felt like if he even breathed the other man would hear him.
Tim waited, completely frozen in his spot. After a few minutes, Bruce slowly sat up and got out of bed. Tim could tell the man’s injuries were still bothering him, his movements slower and more careful than normal as he walked towards the door to the master bathroom.
Before Bruce turned the doorknob, he glanced back at his bedroom door, right where Tim was standing. Tim felt his anxiety surge, hoping it was dark enough that Bruce wouldn't be able to tell his door was cracked open. Tim held his breath, his hands clenched into fists. But Bruce made no indication that he saw anything in the darkness, and he disappeared from Tim’s sight into the bathroom.