Severus sat at the table, close to Harry, keeping an eye on him to ensure he didn't eat too fast and that the mess stayed at a minimum. He also wanted to be aware if the boy had a bowel movement. It would hurt a lot to be left in that mess with his bottom being so raw from his punishments.
"Want coffee," Harry stated, using more of his adult voice than the baby one that was hiding beneath the surface. He cleared his throat to try again to make it even more appropriate of a question. "I would like coffee, professor." He was impressed with himself for fighting the baby language.
Severus shook his head without looking at him. "You're drink is on the tray baby. Coffee is for adults."
Harry scowled. He looked at the bottle as if it was poison. He picked it up and chucked it half way across the dining/kitchen area. "No baba Nape!" He yelled, his baby language coming in with a vengeance when he was upset.
Severus glared at him. "Mind your tone baby. And I've told you to call me daddy."
Harry, not wanting a spanking, modified his demand. "No baba daddy… pease!"
Severus smiled gently due to Harry's attempt at manners. He picked up the bottle from the floor, rinsed the nipple in the sink, and returned it to the tray. "Babies drink from these Harry. If you want a drink, this is it."
Harry growled. It was meant to be fierce and scary, but it was more like a tiny kitten. He snatched the bottle and drank it. He glared at Snape, but as he continued to suck on it, he found it soothing, like his paci. The milk was warm and had a vanilla taste.
"Nilla?" Harry asked around the nipple.
Severus grinned "Yes, baby. Some vanilla in there for you. It's yummy huh?"
Harry nodded. He sucked on the bottle but felt uncomfortable with how much he had to lean his head back to get it to flow quickly. A whine formed from behind the bottle.
Severus moved to unlatch the baby and move him to recline in his lap. He reintroduced the bottle while Harry was in the baby position. He ate from the bottle eagerly. "Fanks daddy" he said around the nipple.
Severus patted his diapered bottom, grinning at his baby, humming as Harry ate contently. Harry's eyes fluttered closed as he drank deeply. Severus had to refill the bottle, by magic so not to interrupt Harry's eating. He downed the second one and unlatched himself from the bottle, pushing it away gently. His eyes were dazed. He had what Severus called "milk coma".
Severus lifted him to his shoulder, getting a slight whine from the baby, and began to pat his back firmly.
"Don't need to daddy," Harry whined, kicking his feet softly.
"There's a burp in there somewhere baby, you had a lot of milk. Burp for daddy bug," Severus continued patting the back firmly.
It took a few minutes, and without warning, a loud burp echoed around the room. Harry blushed a deep red, and Severus praised him "good boy! Is your tummy full baby?"
Harry nodded. His stomach was so full he felt it would burst. It put pressure on him to poop, but he would not. He refused. He clenched and held it all in.
Severus felt the whole body tension, and sighed. He would fight it every step of the way. He carried Harry to the living room. He accio'd some of the toys from his nursery, and had it land in front of them. "How about some play time, love?"
Harry got down from Severus' hold, and looked at all the toys. He looked back and said "Them baby toys. Want big boy toys pease. Boom to fwy?"
Severus brought a toddler safe broom that he thought Harry may like. It only flew high enough that the ground would be 2 inches below the boy's feet, so he couldn't fall. He performed a protective charm around the broom so that Harry had zero chance of falling at all. Even from a small height, a body that big, with reflexes slowing from the de-aging would still hurt.
Harry's eyes lit up, and he bounced and vibrated in place with excitement. He let out a babyish clap of his hands.
Severus got some baby pants and a shirt to put the baby in, so that he wouldn't get a chill while "flying" around. Harry didn't fuss or fight, too excited about flying.
Severus put Harry on the broom toy. It had a seat for him to sit comfortably, not to worry terribly about balance. "Only around the living room love, ok?"
Harry pouted heavily at the restriction, but nodded. He wanted to fly!
The broom was turned on by a flick of a wand, and he was let go. It was incredibly slow. The joy quickly fading from Harry's face. "Faster daddy, pease!" Severus allowed a bit more speed, since he was adapting to baby talk and politeness.
Harry did a few laps around the living room. He still didn't think the speed was fast enough to meet his seeker needs for speed. He decided that he could plant his legs against the wall and push himself off to make sure he could get a burst from the toy. He didn't think Daddy would like this, so he waited until he was sure he was paying attention to his Daily Prophet.
When he had turned the page and began settling in to a new article Harry saw that chance. He finished his lap and made his way toward the wall. He settled his feet to the wall and pushed harshly to get some speed. It worked!... He leaned forward to gain more speed like he would on his Nimbus, forgetting it was a toy. It became top heavy, and he fell face first into the glass coffee table.
Under normal circumstances, Harry would have brushed it off. But something in that damn potion Snape slipped him caused his emotions to be out of whack. He saw the color red, his blood, felt the glass on his face, and let out a blood curdling, screeching, and uninhibited cry for daddy.
Severus' response was instantaneous. He heard the crash and as he set the paper down, saw his baby land in a heap of glass that was the coffee table. He was bleeding, crying, and covered in hot coffee from the table. He rushed and picked up.
"Oh baby, baby, what happened?" Severus couldn't understand how the harm came to the child.
Harry just continued to wail and screech in his arms. Severus assessed his wounds, and decided that a proper medically trained professional should treat this. He didn't want his baby to have additional face scarring because he didn't take the proper steps for treatment.
Fearful that the floo network would startle Harry further, he opted to rush him on foot to the hospital wing that had a permanent residence at Hogwarts.
Harry cried and wailed harder as he left the safety and privacy of his daddy's quarters. The wails echoing loudly off the stone walls of the castle. He could see glances from the passing classrooms as he swiftly moved closer and closer to the hospital.
Severus patted Harry as he carried him quickly. "It's ok baby, it's ok. Daddy's getting help."
"Dem lookin' at me daddy!" he cried. Pointing to the classrooms they were passing.
"They wouldn't dare, baby," Severus said in his ear. "They fear me too much to stare at my baby. If they bother us they will find themselves dissecting dung beetles and harvesting their waste for potions."
"Hurt," Harry wailed, trying to rub his face that his Daddy was keeping tightly to his side.
"I know bug, but no touching, Poppy has to take care of it," he reassured.
Harry shivered hard, "No Docta! No Docta!" He began viciously fighting Severus' hold. Severus quickened his pace. He wasn't sure he could keep his hold without use of his wand that he couldn't get to at the moment. He was panting by the time he crossed the hospital threshold.
"Poppy, assist, now," Severus said, a demanding tone to his voice.
"NO DOCTA!" Harry screeched in Severus' ear. His little body shivered hard, the tears ran down his face, causing more screaming because of the salt mixing into his wounds that had glass still imbedded.
Poppy came sprinting in the room. The confusing across her face flashed plain as day. Harry Potter was being carried by Severus Snape. The infantile pajamas, a pacifier clipped to his shirt, an obvious bulge to make it clear he was wearing protective underwear. She saw the blood spotting Harry's face, and on Severus' robe. She shook herself out of the momentary confusion and led them to an open bed.
"I need to know what this is about Severus," she said sternly. Harry was crying like a baby, sobbing more like it. His cries mimicking that of a very, very small child.
Harry fought with vengeance against Severus sitting with him on the hospital bed. "NO DOCTA DADDY!" The heart breaking sobs and hysterics clear in the cries.
"Please Poppy. Please. I will explain. But right now Harry is in a little head space. He is hurt as you can see. He can't regulate himself. I need your help medically, please make sure he's ok, clean and heal him," Severus begged, fear laced in his usually calm voice.
Poppy took a calming breath. "I can't work with him in hysterics Severus. You need to restrain him or I need to administer a calming draught."
Severus sighed, knowing that he could not hold Harry long enough to get through this safely. "The draught" he resigned.
Harry's cries and screeches were at an all-time high. The door to the hospital wing opened with a bang, and Professor McGonagall entered, followed by the headmaster, Dumbledore.
"Severus! What in Godric's name-," reprimanded McGonagall.
Severus held up a hand to stop the woman. "Please, Minerva!" Severus was attaching a tube to Harry's pacifier so that he would suck the potion down himself, without force. Severus pushed the pacifier into Harry's screaming mouth. He bounced him moderately, "Come on baby, suck on your soother. Calm baby, calm."
After a few moments, Harry obliged, and began suckling his soother. He startled when he felt a potion come through, but it tasted sweet so he suckled with earnest. Moments later Severus could feel the boy relax in his arms.
He set Harry down on the bed, but Harry reached his grabby hands. "Daddy… Daddy…"
Severus picked him back up and had Harry's back against his own chest, so he could face the medical witch.
"What is going on Severus?" Minerva demanded.
Poppy began working on Harry, who was lazily sucking his pacifier but allowing the glass to be removed and healing ointment to be applied to his wounds.
"Albus already filled you in on this Minerva. Harry has become a little, my little. He is very young, often littler than 2, though he can get bigger in moments of defiance," Severus offered the gist version.
"I know that Severus. You can now know I look after Mr. Malfoy, instilling the same discipline measures you have for Mr Potter. What I meant was, what is going on with the child's face?"
Severus' face showed his shock. He didn't know that Minerva also engaged in regression and training of disobedient students. He had wondered why Malfoy was gone from his last class. This must be as a new of an arrangement as his was with Harry.
Severus cleared his throat. "Harry had an accident while riding a toy broom. He crashed into the coffee table and obtained these wounds."
Poppy was already finish attending to the boy's face, and she stripped the boy down, as it was covered in coffee. She examined him for burns but found none.
She ran her wand over him for any other wounds or problems. She looked at Severus and stated, "All his wounds are healed, there will be no lasting damage as you can see. The ointment worked 100%. But this diagnostic shows he is constipated Severus. Were you aware?"
Severus sighed, thankful that the medical witch knew how to treat his baby quickly. He pinched the bridge of his nose, a sign of his tiredness. "Yes, Poppy. He is refusing use of his diaper at the moment."
"I could give him some potions to help move that a long," Poppy smiled.
"No need," Severus shook his head. "I've already added something to baby's milk. He should be cleared out today. If not, we will return. Thank you Poppy."
Harry looked up at him. "Daddy!" He yelled. He had spiked his milk? Harry growled. Damn it. He did not want to shit in diapers. He didn't want to shit in front of anyone!
Severus patted baby's back. "It's ok baby, let's go home. Minerva let me know if in a while you and Mr Malfoy would like to do a play date. Once the head space is solidified I think it would be enjoyable for all."
"Of course, Severus. We look forward to it," She smiled.
Albus followed them both out, a twinkle in his eye.