Sirius/Lily is my guilty pleasure pairing. XD I wrote this for the flash round at mwpp_mischief.

Irrepressible

"Go away, Black."

"Not until you answer my question."

"I don't have to answer anything."

"Come on, don't be a bitch. Why are you always so horrible to James?"

"Watch your mouth!"

"What, gonna give me detention?"

"I've long ago learned the futility in that."

"Tell me, then. The bloke's stupid about you, Evans. Can't you just cut him a break?"

"If you mean go out with him, then no. I don't like him."

"He deserves better than you, but he won't listen to me."

"Why are you always such a bastard?"

"Runs in the family, I guess."

"Well, stop."

"I don't think you want me to stop."

"What the hell makes you think that?"

"Because. Every time we argue like this you get all hot and bothered."

"Right, because you make me angry!"

"I frustrate you."

"Yes!"

"In the pants."

"SIRIUS!"

"You didn't deny it."

"Go away, go away, please, I am trying to study."

"Not until you give me a straight answer."

"A straight fucking answer to what? I don't even know what you're asking me now."

"Do I sexually frustrate you?"

"God, Sirius, honestly—"

"Do I?"

"Fuck off."

"Not until—"

The rest of Sirius's response was drowned in a kiss.