With the care and stealth only a thirteen-year-old can muster, the wolf crept past his sister's room. Peeking through the crack in the door, he could see his sister still in her crib sleeping soundly. The warm morning light shown on her, illuminating her like the little angel she was. Her little chest rose and fell with each gentle breath she took. Michael couldn't help but laugh at his newfound appreciation for his little sister. Thinking back to last night's events, it's no wonder why he had this sudden change of heart. The thought started to stir other urges within him but, right now, his desire for some breakfast was winning out.
	Michael made his way down the hall, carefully skipping the parts of the floor he knew would squeak. When you're a teenager, you just know these things. In the kitchen, he grabbed some cereal from the top shelf. As luck would have it, his mom had purchased his favourite kind! With the clear head only time provides, he could see that she really didn't want to punish him so much as make him learn how to take care of his little sis. 
	"Thanks mom," he said to himself and grabbed a bowl from the other cabinet.
	Pouring a bowl for himself, Michael sat down at the table. He could not hear any noise coming from down the hall, so he assured himself that he was in the clear, at least for a little bit. However, as they say, the best-laid plans...
	When he finished his cereal, Michael gently pushed his chair back and stood up to take his bowl to the sink. In what seemed to be slow motion, he watched as the spoon tilted toward the edge of the bowl and fell toward the tile floor. As a default reaction to anything falling that might break or cause a noise, Michael kicked his foot out in hopes of stopping what would surely be a loud noise. However, instead of the spoon being slowed by his valiant attempt, he mistimed his kick and sent the spoon careening across the kitchen where it bounced noisily off the cabinet, again off the fridge, and finally stopped after several feet of clattering across the tile floor. In a different light, Michael might have seen this as a reason to try out for the soccer team.
	Wincing at the noise, Michael listened carefully for any sound that his sister might have been awakened by the cacophony in the kitchen. Nothing. No crying or stirring came from the room. He let out almost half of a relieved sigh before he heard her starting to stir. Michael quickly went to the living room to turn on some cartoons for the two of them and then made his way to his little sister's room.
	Pushing the door open gently, Michael peeked in to see the cute little wolf cub staring back at him. She made a soft noise as he entered the room. As he approached the crib, her tiny arms shot up toward him and she begged to be picked up. Lifting her gently, Michael could tell that she was definitely in need of a diaper change by the weight of the soggy diaper hanging off her hips. He smiled and cooed down at her as he made his way over to the nearby changing table. 
	Although he didn't experience the same fear as the previous night, Michael still felt a little trepidation as he stared down across his diapered sister lying before him. He could tell from the smell, or lack thereof, that she had just wet herself in her sleep. At least he got to hold off on that for a bit longer.
	Michael grabbed the tapes and began to unfasten the soggy diaper. To him, pulling it open was akin to opening a treasure chest. He almost expected the golden light he saw so often beaming out of chests on cartoons. However, what he found was even better: The small glistening mound of his baby sister. Michael was nearly entranced by the sight but he caught himself before he did anything. He couldn't do this every time he had to change his sister's diaper. No, he had to remain firm. NO! Resolute. He had to remain resolute.
	He held her gently and pulled the wet diaper from under her bottom and dropped it in the bin. He leaned down to grab a clean diaper from the rack, still eyeing the beautiful pup sprawled out before him. His erection was threatening to punch a hole straight through his underwear. As he wiped her pussy clean, he may have spent a little extra time getting every little bit of her. He half-heartedly convinced himself that he was just being thorough. The wolf cub made what can best be described as a tiny moan. With his resolve wavering, Michael quickly fastened the dry diaper around his sister. He let out a long sigh. 
	Carrying his sister with him out to the living room, Michael set her gently in her pillow-donut-thing on the floor and turned the channel to his favourite cartoon. He realized that he was the only one that had eaten so far. She must be starving. Assured that she wouldn't be going anywhere, Michael made his way back to the kitchen to grab something for her to eat. He decided on strained peaches. Yum!
	Michael returned to the living room to find her staring at the TV. She was engrossed in the current cartoon. He tapped the spoon against the side of the jar. Instantly her gaze left the TV and focused on him. She put her arms up and reached for him. Michael chuckled softly at her enthusiasm. He picked her up and sat her on her blanket next to him on the couch. She devoured the entirety of the peaches in short order. Michael shrugged and cleaned her up as best he could with the corner of the blanket. He'd wash it later.
	He lifted her and laid her on his chest. She turned her head to look over at the TV again. Michael, on the other hand, could only focus half his attention on the TV. The other half was focused on his sister, or rather the fact that her diaper was pressed up against his sheath. Every little movement she made sent a tingle down Michael's spine. Soon, his cock began to grow uncomfortably inside his underwear. He could only take so much, however, and he slowly worked his underwear down. Wiggling his legs he managed to get them off. Michael went back to watching cartoons, simply enjoying the naughty feeling of his diapered sister resting gently on his cock. He could stand the teasing for a while.
	The pair watched TV together for about twenty minutes. It was becoming hard for Michael to stay focused on the show because his little sister kept moving around atop his cock. It seemed she was getting more and more restless as the time went on. Michael, missing these subtle clues, simply enjoyed the ride for the moment. He was getting pretty worked up at this point. That's when he heard it. A soft grunt from his sister and he began to feel her messing her diaper. 
	Michael's first instinct was to immediately remove himself from the situation. However, a part of him told him to stay and that part of him was currently nestled snugly against the ever warming seat of his sister's diaper. He could not care less about the fact that he'd have to change her later. Right now, all he cared about was this wonderful sensation assaulting his cock. 
	Moaning aloud, Michael felt his erection react with new vigor to this newly-discovered interest of his. His baby sister looked up at him with a quizzical look. She had finished messing herself, but Michael was too aroused to stop now. He sat upward slightly and placed a hand on her cheek. Gently, but passionately, he brought his lips to hers and kissed her. Their tongues touched as he made out with the confused toddler. She didn't seem particularly resistant to the intrusion. This only added more fuel to the fire of Michael's arousal. She climbed up just a bit toward his face as the continued to make out. This little bit of extra space allowed Michael's cock to spring free from the warm trap of his sister's diaper. 
	Michael's cock came to rest against the back of the wolf cub's messy diaper. It leaked precum down onto the crinkly padding below as well as her rapidly wagging tail. She broke the kiss and looked back at the wetness on her tail. She again made that soft moaning sound which had so enthralled Michael during her morning diaper change. 
	Shaking from the pleasure, Michael removed one hand from its death-grip on the couch and moved it down to grab his dripping cock. If his sister knew what he was doing, she didn't appear opposed to the idea. She cooed and panted at the attention. With the amount of precum seeping from his tip, Michael knew that he'd have plenty of lubrication for what was coming. He grabbed firmly around the base of his cock. With his other hand, he felt around the back of the diaper for the tail opening. He moved his sister's tail up and out of the way to make sure he had a clear shot. Michael moved his cock around until he felt the tip make contact with the warm entrance to his sister's anus. His cock sprayed copious amounts of precum against the tiny pucker. Gently resting the tip against the inviting hole, he looked back up at his sister. She still panted softly and stared into his eyes. He needed no further motivation.
	Even in the heat of the moment, Michael was concerned about hurting his baby sis. However, his fears were unfounded when he heard her little moan again and she smiled up at him. He gently slid just the tip inside her ass. He could feel the small pulses of precum shooting into her bowels. Ever vigilant for signs of discomfort, he pushed yet another inch of his throbbing cock up into his baby sister. The warmth wrapped around him was becoming harder and harder to fight. Michael desperately needed to bury himself in the wolf cub atop him. 
	Pushing her down as he moved his hips upward, Michael inserted his cock even deeper inside the tiny cub on his chest. He felt his knot bump against her anus as he slid inside. The wolf cub didn't seem to mind any of this, in fact, by the noises she was making, she actually seemed to rather enjoy the warm cock currently deep inside her. Michael rested for a moment to regain his composure. He began to move his hips downward again, sliding his slick cock from his sister's ass. Just before the tip left her warm confines, he gently pushed it back inside again. This time, the extra lubrication made the entry much easier. His movements caused the cub to twitch every so often and clench down on his cock, further fueling his desire to bury himself inside her.
	Michael picked up speed and began pumping against the toddler's anus with vigor. His knot pushed firmly against her tight hole with each thrust. The pleasure was becoming too much for him. Michael could feel his orgasm rapidly approaching. His speed increased even further to an almost desperate pace. 
	The last few seconds, Michael forgot entirely about his sister's comfort. The slick anus of the baby above him was too much to bear. A final ragged thrust and he felt his knot pop inside of her. Shaking desperately, Michael throbbed deep inside the tight toddler as his seed painted her insides. He could only moan noisily. The cub gripped down around his knot and coaxed every last drop from him. Around his cock, he could feel the cum flooding her insides. It began to leak around the base of his knot and showed no signs of stopping. For several minutes, Michael filled his baby sister's bowels with as much cum as he could produce. It produced quite a puddle on the blanket beneath them. 
	As the orgasm finally wore off, Michael focused his attention back down to his sister. One thumb in her mouth, the little wolf cub was fast asleep on his chest, his knot still buried inside her. She was so adorable. Michael hadn't even paid much attention to the smell with all the excitement, but now he took note of the messy diaper still clinging to his sister's hips. He considered carrying her to the bathroom to get cleaned up and changed, but looking down at her...
	"I guess you're right. A nap does seem like a nice idea." Still tied deep inside her, Michael wrapped a hand over his baby sister and closed his eyes.