Since Avery was pregnant, she had a big stomach and made a strenuous effort to squat down. Evan was worried about Avery. He wanted to help Avery stand up, but Rebecca stopped him.
Rebecca knew if Andrew and Evan try to protect Avery, aunt will fail. She couldn't put sulfuric acid on her face.
Rebecca wanted to ensure 100% success. She had failed two times. She knew what she should pay attention to.
She had reminded her aunt to be careful.
Rebecca fought against Avery in a roundabout way. At first, she tried to make Avery into a dilemma and then forced her to make an apology to her aunt. All Rebecca wanted to do is to insult her. In this way, Evan and Andrew wouldn't suspect her aunt's aim. Therefore, aunt got the chance to be close to Avery.
To do a real trick, Rebecca put the cup of tea on the stove all the time. When it heated, there were bubbles as if it was hot tea.
In a second, Avery had touched the cup.
