"Your brother's personality seems rather unrestrained, so I simply erased his memory to ensure he doesn't speak of today's events. If you have any objections, I do have other plans," she said.
"What other plans?"
Su Nanzhi slightly smiled. "I could cast a spell on him that makes him slap himself a thousand times whenever he speaks of these events. How about that?"
Xu Jing: "…Just erase his memory."
Su Nanzhi smiled and said nothing.
Xu Jing paused, then asked, "What about me?"
Su Nanzhi: "What about you?"
"Aren't you afraid I might talk?"
Su Nanzhi was silent for a while, then said, "If I erase your memory, who will pay me the final installment?"
Xu Jing: "…"
He couldn't argue with that.
"So you're not worried I might talk?"
Su Nanzhi: "Shall I cast a spell on you too?"
Xu Jing: "You might as well erase my memory too."
If he accidentally spoke out and ended up slapping himself in public, it wouldn't be fun.