There's that paranoia again. Tony can actually feel it seep into him and he has to put his foot down on it. Rogers and Romanoff are SHIELD. Fury is SHIELD. "Not saying no, but there are easier ways to kill me," Tony says. "Pretty sure that would be a dumb move on their part. Kill me, kill you. They already have all of Banner's research and Thor's confirmation on the subject."

And Fury did do his cruel little trick to test their bonded sensitivities--

Which stirs Tony even more as he lifts one hand to Loki's angular, long face. "Are you all right?" He's had the reactor out enough to clean it, to install a new one, and when family members have gotten testy with him. He knows the feeling of having his heart stop. But does Loki? Likely he does now. Tony's other hand presses firmly to the god's chest. "Still with me and everything?"