If one were to look at her current behavior from the perspective of an adult, it would indeed be untenable.
But, if one were to think of her as Jiang Yu who was only a few years old…
Then he wouldn't be able to accept that she was his uncle!
And Feng Linbai was her brother!
But, Jiang Chenglang immediately said, "Big Brother is already a big child. He can't sleep on the same bed as Xiao Yu."
Jiang Chenglang told himself that he was forced to do so.
Who asked Jiang Yu to call Feng Linbai "Big Brother?"
This was probably called following the customs of the country? Otherwise, how could he coax Jiang Yu?
Jiang Yu answered crisply, "Even if Big Brother is a big kid, I'm still a kid. What does that have to do with me sleeping with Big Brother?"
Jiang Chenglang: "..."
It was reasonable and was really hard to refute.