1)
Why did He ask if they forgot?
1.
Malbim: Did you forget the cause of the evil? The kings and nation sinned in public. You cannot forget this!
2)
Which women does this refer to?
1.
Radak: It is the wives of each king. We find that Aviyah's wife made Mifletzes for the Asherah (Melachim I, 15:13).