After Phaethon died, Olympus just wanted to find a conclusion to this disaster.
Clymene refused to accept it.
What she wants to know is not "who killed her son", but how many gods pushed the boy onto the sun chariot step by step.
When the tide flooded the temple for the first time, the gods finally remembered:
The woman who has always been called the "Mother of the Sons of the Sun" was herself an ancient god.