Somewhere deep in Barton's heart the Tesseract wrapped itself around an orphan boy with a need to be wanted and accepted. And that buried emotion left Barton leaning ever so slightly into Loki's touch.

The blue-eyed archer was a willing tool to everything Loki required of him. And worse, he drew on every bit of energy, of dedication, and of knowledge instilled in him by Shield or absorbed in his years as the soldier he was trained into being. His mind was working against him. The Tesseract left him more than willing to do anything Loki asked of him. Showed him how simple life could be, the way he was always supposed to have lived. For the next order. The next mission.

It wasn't who he was. It wasn't what he wanted. And yet it was all he could do. Give in. Whatever Loki wanted. Whatever Loki needed. Clint reacted to it and provided it.