The other dragonlings heard what he muttered and looked up, but they saw nothing amiss. This is not the first time that two suns will be in the sky. It just means that the dragon continent has moved into the path of the two stars. It is nothing strange.
Mother also hasn't moved and doesn't appear concerned. If she doesn't think there is anything to be worried about, then there is nothing for them to be worried about. So they stopped paying attention to the sky.
Only the second continued looking at the second star. He continued to do so for more than an hour. Nothing happened during that time. But it turned out that his worries were not unfounded.
Something strange did happen after two hours of its appearance. The second sun enlarged, and the heat from it increased.
Second became agitated. He said, "It is falling from the sky."