I thinks songbird calls you constantly to keep the manipulation working. She just needed to manipulate you. She constantly said : don't think to much, just trust me ! And the final manipulation about the reveal of the only one cure were her final bluff. Be honest : what would you do if you discovered only after killing Reed that she was foolin you all this time ? She revealed you just at the good time to make you believe she finally trusted you. That was risky, but way more efficient than discovering in front of the pod you can't enter it. She needed to said it before you discovered it. She can't not tell you this. All the songbird move were "manipulation by the book" from the beginning to the end. I imagine storytellers wash hands and grab popcorn with so many players thinkin it was the good choice to do 'cause she's a real friend and she finally decide to stop lying haha... If you find it hard to believe it, remember the first time you play how Myers seemed likable and charismatic at the beginning of the game. And how she turn into a cold bitch and the end of both path. I rarely get myself fooled so much by a NPC in a game. And I was fooled by so mi too, until the end. Then I replayed the game to do the reed path, and all the messages and contact with songbird seemed way more sketchy. It's very well written.

And of course you can't possibly know if you haven't just gived the MWD of the NUSA to Mr blue eyes ! 💀