Cosima manages not to entirely smile at "bosoms," but it slightly breaks some tension.

"Some of us are sick," she says to Helena. "It makes us cough." Blood, but that's not necessary to explain why Sarah'd gestured to her chest. "And it means we can't have kids. I wonder if that was the point? I mean, it'd make a lot more sense; control the experiment by making sure we can't go spreading our copyrighted genes into the general population where they get harder to control. I can't think what the self-destruction would get them, not widespread like this."

She hasn't given Dyad this much thought in months, she realizes, startled. Corypheus might be trying to destroy the world, but at least it wasn't personal.