Rosario hadn't even gotten to the twin sister of it all, and Christ had that one thrown her for a loop. She was just barely getting her head around the idea that she and Archer were related; the idea that there was a second, girl-Archer somewhere out there in the world was way too much for her to process, and Lyra was the only person she could tell about it (unless she wanted to subject herself to another barrage of UFO crazy from Avery, which, no. Definitely pass).
Her expression fell for an instant, but Lyra voluntarily cutting short a conversation involving the words 'evil half-brother' was so un-Lyra-like that it gave Rosario pause. "Oh, uh, sure. Yeah, wassup?"