If Rebecca Smith did it, it could be seen as a warning. However, if it wasn't her doing, she wouldn't end up offending her.
The key is that Rebecca still can't clearly ask Miss Chu about her true intentions.
If she asked, then it would prove that Rebecca is guilty, since she's protesting too much.
True to her role as Hank Clegg's biological mother!
What's the point of installing a surveillance camera? Is it useful?
Does she plan to let her watch as Victoria Talkington meticulously looks after Hank Clegg and show off their affection in front of her?
Does she think Rebecca Smith is a pushover?
Thinking of this, Rebecca Smith was very unhappy, but still maintained her usual frankness, "Auntie, it's great that you thought of this method. However, sometimes it's impossible to be timely and thorough. Just like this morning, I actually noticed something strange and purposely fetched fresh water for my sister. Ah, who knew… I still couldn't prevent it…"