I Thought She Was the Older Sister, but She Was the Younger Sister, an Assassin

Shen Xin never imagined that his sweet, gentle wife was a killer.

Shen Xin: "You're a killer? The top-ranked one, codenamed Fox?"

You Keke: "Yes, I..."

Shen Xin: "He's my older brother."

You Keke: "I'm sorry."

Li Xixi stared at the letter in her hands, tears streaming down her face as she murmured, "You idiot. I knew all along, you know."