Masked Emotions by Elle Rease
Stella barely survived the calculated attack meant for SIN. Heck, she's barely survived the heartbreak from his refusal to trust her with his identity. She's angry. And reckless. Driven by the desire to take her power back, she begins to estrange the people who care about her most: her best friends, Noel and Amy, her sister, who had recently forgiven her past indiscretions, and SIN. All the while, SIN fights to save Earth from the impending Parasites invasion, even though most of the human race have lost faith in their superhero.