C226 Don't Keep Your Brother Waiting

Gu Xinyuan's smile froze. What did her brother mean by that? What did he mean by disrespectful? Shouldn't she call him brother?

Her name was Elder Sister Ji Qing... but it didn't seem like she should call him big brother either!

Gu Xinyuan's brows curved and she tactfully changed her words, "Hello, sister-in-law! Hehe, from today onwards, I will call you sister-in-law! Brother is right