A Slytherin Obsession

(UNEDITED)

"How do you know my dad?" Sirius smirked, "We went to school together. Never got along unfortunately, I was a Slytherin after all."

Harry frowned, "I'm in Slytherin."

"Yes, but you're his son. Plus, we're no longer in school. Hr can't exactly keep that Slytherin's are evil mindset now can he?"

Harry fidgeted with his hands, letting his eyes wander over Sirius' tattoos. "I think my dad has mentioned you before, I remember him talking about a guy with tattoos from a few of his cases."

Sirius snickered, "Wouldn't surprise me, I do like to keep him on his toes."

Harry blinked, "You're not dangerous, are you?" Sirius let out a bark like laugh, "You've been in here for nearly an hour and only just ask that now?"

Harry shrugged, "Never said I was the smart one." Sirius grinned, "Nothing wrong with that."

"I think I should go.. before someone realizes I'm gone," Harry mumbled.

Sirius snorted, "Tell your father.. tell him I said hi," Harry nodded. "I don't think he'd be able to know about this-"Oh, trust me, he won't."

Sirius smirked, "That's the fun part."