Family or Power?

In the living room, Aerie is rubbing Little Sho's cheeks. "Don't poop so much."

"Don't tell him that." The maid tells her gently, "Babies shouldn't hold it back. It hurts them."

She blinks her eyes. "Adults don't get hurt if they hold back their poops?"

"It does," The maid says to her, "They get constipated."

Little Sho raises his arms and legs, grabbing his sister's hair.

"Ow!" Aerie loosens Sho's little fingers. "Sho, if you don't stop pulling my hair, I am going to dress you like a girl and take your photos. I am sure that Elder Brother would love it."

Standing near the door, Yuta's lips tremble when he hears her words. Though he can't think of her as a younger sister, she still thinks of him as an elder brother. 

What is the right thing to do?

The baby squeals on the couch as if he can understand Aerie's words and he is fine with girls' clothing.