"That's sweet." Then they take her a piece of her hair, a finger nail clipping, or anything else apparently innocuous. Blood isn't the only way they can get the information, so anything else will then become their goal; especially if she's nice enough to let them go through the full physical, which includes getting a saliva sample as they test for overall health.

So the question is, how savvy is Fef to what people can extra genetic info from?