Talara II by Liana Laskin

Talarans, a race of advanced and deceptively angelic aliens, invade and claim Earth as their new home. A handful of human uprisings and a short but violent period known as "The Flaming Purge" are followed by several decades of an uneasy peace.When a human rebel named Eric Matterson attempts to assassinate a Talaran senator, tensions between humans and Talarans are thrown back into high gear.This, in turn, forces Addison, a captain in the Talaran army, to face long buried memories surrounding Eric.When she tries to save him from the barbaric torture of a mind-wipe, the senator forces her to take full responsibility for Eric’s “rehabilitation”. Addison soon finds herself developing forbidden feelings for the rebel. She must keep her assignment a secret from both humans and Talarans, but most of all she cannot let Eric learn the truth behind their tragic past connection