1)
How did He give her over to her lovers?
1.
Rashi: Sancheriv exiled them. Radak ? this is because she removed her trust from Me, and trusted in Bnei Ashur and learned their abominations and idolatry.
2.
Malbim: Hashem caused that due to this (sending to Soa Melech Mitzrayim for help), Melech Ashur considered them rebels.
2)
What do we learn from "Asher Agvah Aleihem"?
1.
Malbim: They were under the Reshus of Ashur. Therefore, they took vengeance against them for wanting to rebel and accept the yoke of Malchus Mitzrayim.