Just a note to all readers, this follows in the same universe as my fiction 'What have I done?' If you've read the fiction, you know this will contain at least implied slash, if you haven't, well, read this then go read it! This also contains foreshadowing
Putting the puzzle together...
"Sirius?" Harry asked.
"Yes Harry?" Sirius replied, taking a sip of his butterbeer.
"Where do babies come from?" He asked and Sirius choked and sprayed the drink all over. When he finally recovered he noticed how the 6-year-old was looking at him strangely, his face splattered with butterbeer
"Well Harry, It's really quite simple, see it all has to do with birds?"
"Birds?"
"Yes birds. And bees. See, when a man and a woman love each other, they will put certain parts of their body together"
"Like A puzzle?"
"Yes, sort of. See the dad had the piece and the mommy has the hole. And when they put them together, they have a baby."
There was silence for a minute, as if harry was taking this all in. "Sirius, you said you need a mommy's hole and a daddy's puzzle piece. But what about you and Moony."
"Harry, me and moony don't do that."
"Yes! You do! I saw you last night on the couch when moony came over here. You were kissing like I sometimes see mummy n daddy do when I can't sleep."
"Err, well you see Harry..."
"Oh I understand."
"You do?"
"Moony doesn't have a puzzle piece."
"No moony has a puzzle piece."
"So you don't have one?"
"I do!" Harry folded his arms.
"I don't believe you." He said and Remus walked into the kitchen.
"Morning everyone."
"Moony, tell Sirius he doesn't have a puzzle piece."
"I do to, tell him moony. I do have a puzzle piece,"
"What puzzle?"
"It's a long story moony." Sirius said and Remus frowned at Sirius before turning to harry.
"Harry, what puzzle?"
"Sirius said babies come when a bird and a bee give a daddy a puzzle piece and he puts it in a mommy's hole and makes a baby and he said you don't have one? Why? Doesn't the bee like werewolves?" Remus, looking shocked, turned back to Sirius.
"Sirius, you have some serious explaining to do..." He said angrily
"Moony, I didn't say that, it's just."
"Whatever Sirius." Remus huffed and stalked out the room. Sirius turned to Harry and glared at him.
"Thanks Harry."
"Aww, is your piece going to get lonely?"
"Yep, for a very long time" Sirius said glumly.
"Aww, well you can always use my piece."