"Y-yeah, sure" Audrey replied, just as Muku said. She and her mother's heart were holding her back. She could have suppressed Chloe with her aura alone but didn't know if it would anger Chloe even more and make her overdraft herself which would require more time to recover from. As for fighting out with Chloe, she didn't know how to properly control her strength yet, evidenced by the slight push that threw Chloe away, which was unintentional. So she chose to let Chloe tire herself instead. But Muku had other plans.
The more time Chloe spends in the berserk state that doesn't care about her body condition, the more self-harm she'll be causing herself. So Muku came to try and knock her out.
"Steel Cage!" Muku cast a spell that trapped Chloe within it.
Boom! Boom! Boom! Bang!
But the lightning bolts from the sky made quick work of it. And Chloe broke out. Her current state of mind was to attack anyone closest to her, who was now Muku, and so she attacked.