"Daaaaad...", Harry whined, but immediatley Severus held up his hand. "Stop whinig, sweetheart, you're old enough to know that whining won't make me leave work faster. It'll only be two more hours. Why don't you go home and start on the snacks?", he suggested. Harry huffed. It was Friday, that meant special movie night. But his Dad had to work till 7 pm in their little book store. That meant Harry had to wait an excrutiatingly long time. The young boy threw a half-hearted glare at his father and defeatedly turned around to leave the store. "I still love you, son!", Severus called after Harry and laughed quietly to himself.
Finally, the clock hit 7 pm. Severus closed his book store, making sure to properly lock the door, and started walking home. The little house Harry and he shared was only five minutes away. They lived in a quiet suburban area with few houses where nothing really happened. Still, Severus' book store Myths and Legends was well known and many people from different towns came by every day and most left with a book or two. Severus had to homeschool his son so he wouldn't have to walk over an hour to the next bus stop to drive another hour to school, and even though he definitely did have the money to buy a whole mansion, the little family loved their home and no money could buy them the happiness and coziness their little brick house with the small garden gave them.
Harry was already in his pyjama on the couch, all snuggled up in a blanket and a plate with snacks on the coffee table, when Severus entered. "You look adorable, son. Let me change into some comfortable clothes and I'll join you. Did you already pick one or two movies?", Severus asked while walking over to his bedroom to change his clothes. "I did", Harry yelled back, "I was hoping we could watch The Goonies." Severus came back and nodded in agreement. "Alright, should I start the movie?", he asked and Harry enthusiastically nodded.
When Severus sat down on the couch, Harry immediately scooted over to him and put one of his father's arms around his shoulders. "You are always at work, Dad. I barely see you when it's not weekend. You give me the stuff I have to do in the morning and we go over it in the evening. It feels so rushed. I wish we had more time. Not just our Friday movie nights and the weekend. Like on Wednesdays you could stay home with me and actually do my schoolwork with me so I don't have to do it all on my own", Harry complained. Severus sighed. "Sweetheart, I know. I miss some more time with you too. How about we start with you coming with me to work on Wednesdays? That way we spend time together and I can prepare you for later, when you take over the book store", Severus offered. Harry smiled. "Yes, that sounds like somthing we could try." He snuggled closer to Severus. The man could hear a crinkle. "Aw, honey, are you wearing your special underwear?", he cooed. Harry only took his father's hand and put it on his crotch. Severus gently patted it. "Let me see if you put it on correctly", he said and slightly pulled down Harry's pyjama pants. After re-taping the diaper, he pulled them back up. "You're getting better, honey, but let me show you next time how to tape the diaper properly", Severus smiled at his son. Harry grinned back.
Not long after Harry let out a small sigh and a faint hissing sound reached Severus' ears. He turned his head to see his son pressing his hand into his crotch while there was slowly a bulge forming. Harry started to massage his diaper clad crotch and closed his eyes. Tiny whimpers escaped him and his breathing increased. "Are you having fun, darling?", Severus chuckled. Harry blushed and nodded. "Can I sit in your lap, Daddy?", he shyly asked. Wordlessly, his Father pulled him on his lap. Severus tightly hugged his son. Harry rubbed the front of his diaper and every once in a while he would press down. He was feeling so good. The warm wet material of the diaper was deliciously rubbing against his private parts and sent sparks of tingeling excitement through his body. Harry felt so safe in his Dad's strong arms. The feeling between his legs was getting stronger. Harry shifted until he faced Severus, with both legs to either sides of the man's thighs. Severus knowingly smiled and embraced his boy. Promptly Harry started with small rhythmical movements. Rocking back and forth Harry got stimulated from the wet diaper. He pressed himself tighter against his Dad to get more friction. "I feel so good, Daddy", Harry moaned. His rocking got faster. "You're doing so good, darling. I bet you feel amazing, sweetheart. It's okay, I'm here for you to feel amazing", Severus encouraged his son and held onto Harry's butt to give him more stability. Harry was now full on humping his Dad. He knew it was okay. His Daddy kept him safe and this was their special time. Daddy would help him feel amazing. Clean him up afterwards, cuddle with him and make him feel like the happiest person in the world. With these thoughts in mind Harry came. He clung to Severus's shoulders and rode out his orgasm. Fireworks exploded in his abdomen. "That's my boy. You did so well, love", Severus praised him and hugged Harry to his chest.
After Harry had calmed down, Severus carried him to the bathroom. He freed his son from the used diaper and gave him a quick wash. Harry yawned. "Oh someone's tired. Let's get you into a new diaper and into bed", Severus chuckled. Harry was already half asleep. Severus quickly taped up a new diaper and carried Harry into his bedroom. After tucking him in he went to leave the room, but Harry mumbled: "I felt so amazing, Dad. Have you ever felt like this?" Severus brushed over Harrys head. "No, I didn't. I never really had the urge to experience something sexual. But I'm more than happy to help you feel great, my angel. Now sleep. I have a trip planned for us tomorrow", Severus explained and kissed his son on the forehead.
When he later laid in bed, he thought about his relationship with his son. Every since he had adopted Harry, diapers were a comfort item for the boy. Harry had free access to diapers whenever he wanted and Severus accepted his son just the way he was. When Harry had started puberty, the sexual element came to it, but Severus wanted his son to be happy. Friday movie nights became a tradition. Bonding time. Everything was good. And Severus wouldn't trade his life for anything in the world.