In order to confirm she wasn't wrong, Mrs. Cheng took out Cheng Wei's sister's photo and asked her,
"Master Yu please look at this photo and tell me is she the one who is behind this?"
Yu Holea looked at the photo and nodded.
Mrs. Cheng eyed Cheng Wei as if saying, 'Look!'
Cheng Wei shook his head in disbelief and said,
"Impossible! My sister can never do such a thing."
Yu Holea saw his disbelief and said,
"We can confirm it."
Both Mrs. Cheng and Cheng Wei were a little surprised by the fact of how easily Yu Holea said that it could be confirmed.
Yu Holea smiled seeing their surprised expression and said,
"But you will need a person who will be monitoring her."
Cheng Wei and Mrs. Cheng somewhat understood Yu Holea's plan and after some thought they agreed.
Soon they tracked Cheng Wei's sister's location and hired a person to monitor her.