Disclaimer: I do not own Sherlock or Harry Potter
Sherlock had been invited to John's home for a while over Christmas break. He'd accepted and so the two sat together for the train ride home. Because it was such a long ride, and because boys will be boys, the compartment door was locked for the majority of the ride so no one would walk in on them snogging. By the time the train got to the station, they had already stopped, not wanting to get too heated and began making sure they looked fine, lest John's parents question their severely kissed appearances.
As they got off the train they had to hold onto each other so they didn't get trampled in the chaos. John tugged Sherlock over to the Watsons who beamed at the boys.
"Pleasure." Mr. Watson smiled at Sherlock as he and John went to get the boy's bags.
"So you must be Sherlock. John's written us about you." She smiled.
"Hopefully not all bad things." Sherlock said.
"Oh no, only good things. He quite admires you and I think there's something else going on under all the awe and admiration." She smiled knowingly. Sherlock blushed slightly but confessed nothing.
When John and Mr. Watson returned carrying the bags they set off in a cheap car with Mr. Watson driving.
"Harry won't be joining us this year." Mrs. Watson said over her shoulder to John.
"Harry's my sister." John said to Sherlock who nodded. The rest of the ride was spent in silence as everyone looked out the windows at the scenery.
When they got to the Watson residence John and Sherlock carried their trunks up to the room they'd be sharing before sitting on the bed. John kicked the door shut and sighed, leaning on Sherlock's bony shoulder. "Is something wrong?" Sherlock asked trying to be a good boyfriend.
"I shouldn't have asked you to come." John mumbled as he flopped back across the bed dramatically.
"I'm glad you did." Sherlock mumbled.
"I mean, I'll like spending Christmas with you. It's just my family." John said.
"You mean your dad's drinking problem?" Sherlock asked. John winced.
"How did you know?" John asked looking pained.
"He checked his mobile at the station. Sherlock picked up John's mobile from where it had been left during school and pointed to the charger where it was plugged into the device. "See? No scratches. Never seen a drunk's phone without them." Sherlock put John's phone back.
"He usually just passes out but if he doesn't..." John left the story unfinished. "When I told them I was bi he nearly took my head off but then Harry said she was lesbian and he beat her so bad." John murmured as he rolled over so he was lying on his stomach.
"She took care of you." Sherlock said as he let his hand rest on John's back. John looked over at Sherlock before sitting up and kissing the boy softly. They reluctantly parted when a knock sounded from the door.
"John honey, don't forget to unpack and then can you go out and check on the garden?" Mrs. Watson asked through the door.
"Sure mum." John responded with a sigh.
"Thank you sweetie." She called before walking off again. They unpacked quietly each thinking deep thoughts and then went down to the garden. When that was done they went back to John's room.
"Wanna watch a movie?" John asked.
"One of those muggle movies?" Sherlock asked looking at the stack in the corner.
"Yeah." John smiled and pulled one from the precarious pile. "You'll like this one." He assured Sherlock as they sat on the bed and watched Saw 2. When Sherlock laughed at the gore John got a little creeped out so they decided to do something else.