Weird

Immediately after Diana left the room, Ethan was about to thank his kids for the help, but they actually ignored him. 

They both return to their respective bed, instead of the one they shared with him and pull their blanket to cover up to their face. 

"Oh God!" Ethan is losing his mind now, but here is an opportunity. 

Based on what the twins just did, he can leave the house without the fear that Diana will run away before he returns.

"I will set things right, I promise." after saying this, Ethan left the room. 

The two pulled down their cover after they heard the sound of the door being shut. 

Ciara quickly got down and went to her sister's bed, holding her hands that were shaking. "it will be okay." she assured. 

"What if mommy leaves?" Clara asked. She's less mature than Ciara, and couldn't handle her emotions too much. 

In short, she's just like Diana.