C387 start to shake

Sister Lan held back her laughter and shook her head. She then covered her face and bent down to her knees.

I was a little confused as I looked at the both of them, "You two are crazy. What are you laughing about? If you want to laugh, then laugh out loud. What does this mean? Stealthily, as if you can't see the light of day. It's like you can only laugh in the dark ?"

After I finished speaking