Makes her tell him, and then let's Bimbo Yang do anything she wants with Weiss.

"Alright Weiss, I'm going to ask you a question, and you're going to answer honestly. Were you responsible for reporting me?" he asked.

"...y-yeeees," she dragged it out, struggling against the command.

"Why?" he asked.

"...I knew it wouldn't amount to much, but I wanted to at least get you in a little bit of trouble..."

"Hmm," he shrugged. "Alright then..."

"So... What happens now?"

"Tell you what Weiss. I'm a fair man. I'm going to give you exactly one chance to apologize and mitigate your punishment of your own free will."

"...yeah, hell no."

"I see," he smirked. Stubborn as always. "Well then, time to make you pay for it. Yang... Have fun with her... And while you're at it... Ditzy Shapely Blonde."

The switch flipped in Yang's mind and she giggled. "Oh yeah, like, it's totes awesome to be back!" she said as she shrugged off her underwear, and looked at Weiss, who looked aghast, and awaited her punishment.