C686 My Sister-in-law Is Taking Pleasure in His Misfortune

"Knock knock."

Someone knocked on the door.

Before Chuchen could move, Mu, who had just changed his clothes, volunteered, "Mom, I'll go and open the door."

As he spoke, he slid off the bed and ran to open the door.

Chuchen was worried that he would not be able to reach the door handle, so she followed him.

Mu was taller than his peers, so he could stand on his tiptoes and open the door