Sorry this chapter's so short; I think part of the Natasha/Loki POV actually ended up in the prologue, and I couldn't figure out how to work it into this chapter instead.
"Does that mean that I need to pretend to be infatuated by you, my dear Agent Romanoff?" Loki asked with his usual sly smile.
"That's what I'm hearing," Natasha answered, her smile all teeth despite her terse tone.
Loki sighed laboriously and said, "Very well; let's - what is the saying? - show them how it's done."
Nat stepped closer to the god of mischief, wrapping her arms calmly around his neck as his hands slid to rest below the small of her back. It took all of her self-restraint not to knee him right where they were. Yes, she was used to smarmy guys touching her, but this was Loki, and after what he had done to Clint… That was Coulson's point though. She needed to be able to play along, even with the scum of the earth… or of Asgard, as the case was. So she smiled and she flirted with Loki just like she had done a million times before – but she had never wanted to kill someone so badly in her life as she wanted to end Loki Laufeyson in that moment, and they both knew it.
And Natasha certainly wasn't helped when Coulson calmly pointed out how well the assassin and the god were working together.