Kymi gives in

"My sister's turning purple, you pervert. Let her go!"

You ignore Kymi and the rest of the rapt, covertly jilling art class audience and keep your cock buried in Saki's tight half-Japanese throat. The girl helplessly gurgles and drools, but has miraculously managed to not throw up. Her black hair is very pretty around her face.

"Fine!" Kymi exclaims. She crosses her arms under her perky tits. "What do you want?"

"Oh, you're concerned about your slutty sister now?"

You reach down and pinch Saki's cute nose for a minute. Her eyes roll back into focus, so you pull out and let her breathe in with a gasp before ramming your cock back down her purple throat.

"Yes, for fuck's sake, I care about my sister."

"Take off your tank top, whore."

"What!?"

"This isn't a debate. Do you want my cock out of your sister's mouth hole or not?"

Kymi glowers and yanks the green tank top over her head. Her bared tits are every bit as perky as you thought. She brushes her dyed blonde hair out of her eyes.

"Good," you say, rotating Saki's head around your cock for a good angle. "Now push your dumb slutty tongue up my ass and maybe I'll fuck your face instead of your sister's for a bit."

"You're gross," Kymi says, but she gets on her knees behind you and buries her nose in your disgusting ass crack.

"Deeper, rimjob whore," you tell her, until you feel one half-Japanese twin's tongue probing your ass ring and the other's tongue on the underside of your balls. The daughters of the rich attorney are getting a real oral argument day in the middle of art class.