Cosima is way, way out of her depth here. On a variety of levels. She's pretty sure she's never been involved in killing a human before, but she shuts that out. Survival first. Everything else later.

Instead, she gives a nod. If Jaime's going to object to the plan, now's the time, because Cosima clears her throat and then starts coughing. It's voluntary enough, at first, but her lungs really are a problem. Soon the sound is uncomfortable, wrenching and wet and truly alarming.

She hopes she'll have time to stop coughing while the other two take out the guard. It would be a bit humiliating otherwise.