Ruby has one more grievance.

"Oh, Weiss, before your punishment ends, I got one more thing to bring up," Ruby smirked, stopping Yang from moving back, and with a grin, Yang instead raised a hand to spank again.

"Unh, what else did I do, Mistress?" Weiss whined, but shook her ass eagerly regardless.

"You remember how we first met, dontcha?" Ruby grinned in almost malicious glee.

"Ummm... When you set off my Dust, Mistress?" Weiss pouted, before yelping as Yang spanked her again.

"Wrong, when you caused me to set off your Dust," Ruby smirked as she crossed her arms. When Weiss looked confused, Ruby clarified, "I mean, to be fair, I did initially crash into your luggage that had the Dust in it, but it didn't go off then. It went off when you berated me over it, and you shook some of it under my nose until the fumes caused me to sneeze, and THAT'S when it went off. I mean, what did you think was going to happen, shaking around volatile stuff you knew was volatile, my sneeze was just the last straw in that moment, and you caused it."

"... equal responsibility, Mistress?" Weiss asked sheepishly, before eeping at another spank.

"...equal responsibility," Ruby agreed.

"I'm sorry for my part of making us explode when we met, Mistress," Weiss moaned at a final slap, before Yang finally let up, before cupping Weiss's face, finally cleaning Ruby's cum off of it with her tongue, making Weiss moan.