How about the ball pit?

"Why?" she asked. She was going to take a few days off the same week to visit her parents. She had not visited them since Xiao Yunjie's disappearance. Every year, in order to hide from others, she would bribe the old caretaker with money and alcohol so that he would let her sneak into the cemetery in the middle of the night. 

However, with Xiao Yunjie's disappearance, she could not afford to put aside the money for it, and it had been eating her inside, making her feel guiltier than ever. "There's nothing about that in your schedule," she said with a pout, clearly upset that he did not tell her beforehand.

"It's the death anniversary of my dear friend's parents. It has been a while since I went to visit them, so I figured I might as well go now that I receive an invitation to go to a party there." 

"Invitation?" She tried to think about last week's work, but she did not recall that he received an invitation.