Unfortunately, Severus discovered that he had little control over how he acted while in his sleep.
Severus woke up to find Harry lying against him and using his chest as a pillow, and that his own arms were wrapped tightly around Harry, holding the boy close. Not wanting to disturb the boy, Severus did not move; but as the minutes ticked past he felt his self-restraint slipping.
"No harm can be done if I simply stroke Harry's hair," Severus thought thoroughly, remembering how his mother had done that to him when he was a young boy. It was a sign of affection, and even his father had had a similar gesture, in which he would ruffle Severus' hair when he had done a good job at whatever chore he had been given.
Slowly, Severus moved his hand up from Harry's back to Harry's head, and slid his fingers through the boy's soft black hair. Harry made a small noise— sounding similar to both a squeak and a groan— and moved in closer to the priest. Severus continued to stroke Harry's hair, smiling softly to himself as the boy nuzzled his face into Severus' chest.
For several minutes Severus simply lay in bed, stroking Harry's hair as the boy slept. However, eventually Severus remembered his duties as a priest and sat up as much as he could— without awakening Harry— to look at the grandfather clock on the opposite wall. It was six o'clock am; too early for most boys, but morning mass was at eight, and it was mandatory.
Gently, Severus nudged Harry's back in an attempt to wake him up. Harry groaned and rubbed his face against Severus' chest, sneezing as Severus' chest hair tickled his nose. Raising his head slowly, Harry awakened and looked up at Severus.
"You're awake, I see," Severus said, amused. Harry made a grumbling sound at the back of his throat and plopped his head back onto Severus' chest.
"No; it's time to get up," said Severus, his usual strictness starting to leak past the kindness in his voice. Harry groaned once more, but actually sat up and attempted to look awake.
"Good morning," Harry mumbled sleepily, smiling at Severus before he yawned widely.
"Good morning, Harry," Severus replied quietly.
Harry scrambled clumsily out of bed and Severus laughed as he almost tripped over his own two feet. Severus sat up and swung his feet over the edge of the bed. Just then, he heard the loud thump of his wardrobe door hitting the wall, and when he turned his head to see what caused the noise he saw Harry scrounging about inside his wardrobe. Severus starred at the boy for a moment, curious as to what exactly Harry was doing, but before Severus could even open his mouth to inquire, Harry came rushing back over to the bed with an armful of clothing.
"I got your clothes for you," Harry said quickly, smiling all-too sweetly up at Severus, "Your uhmm… cleric— no; your…"
"Clerical clothing," Severus offered, picking up his clothes and preparing to go into the bathroom.
"What are they all called?" asked Harry, "What's the big robe named?" Harry looked eagerly up at Severus, clearly wanting to learn. Severus sighed— slightly irritated— and laid out his various articles of clothing upon the bed.
"The robe is called a cassock," Severus began, pointing to the ankle-length robe in question. He continued to name the rest of his clothing; which, he had to admit, all had very strange names considering they were simply clothing.
"Your clothes look a lot nicer than mine," Harry intoned a little childishly, smoothing his small hand over the front of the cassock. "My clothes are all old and worn-out." Severus felt his chest tighten, and he couldn't help himself as he felt his face heat.
"There are uniforms for the children who stay at the orphanage," said Severus, resting his hand gently on Harry's shoulder as he spoke. Harry continued to run his hands over Severus' cassock, and Severus felt the stirring of arousal once more as his fingers wandered slightly over Harry's collar and up his neck. As Severus' hand moved through the soft hair at the base of Harry's neck, Harry stopped touching the cassock and leaned back into the priest's touch.
"Feels nice," Harry mumbled as Severus petted his hair; and Severus had to pull away as his penis began to swell.
"I-I must get dressed, Harry," Severus said quickly, picking up his clothes and draping them over his arm as he headed to the bathroom, "You get dressed as well. Then you and I will go and get you a brand new uniform, and then you wont have to wear these old clothes."
Harry smiled adorably at Severus, and as Severus disappeared into the bathroom, Harry murmured, "Thank you."