Loki and Nora
Despite suddenly feeling rather violent (and desperately wanting sex) she had no intentions of killing Loki. Even in this state. Or, trying to kill him. That would be counterproductive. And she wasn't evil, just violent.
Her hand squeezed his throat, and she nipped lightly at Loki's ear as her hand squeezed tighter. Then there was a harder bite, followed by the coppery taste of blood. The taste seemed to bring her back to her senses for a moment, and she pulled herself off his lap.
She wrapped her arms around her waist, taking a few steps back from Loki. From her friend. "I'm so sorry.... I..." She knew words couldn't make up for anything, though. She stumbled back a few paces again, before falling to her knees.