After a no small amount of complaining and swearing and feeling horribly sick, between the exhaustion from the radiation poisoning and the gin, Janey betrays herself.
"I just can't get used to the wasteland water, either I stay tipsy or I stay poisoned." It's half complaint, again, half explanation, because no one gets sick that often, but she was out of alcohol - and then Janey realizes she just told Water Vaultie she can't get used to Wasteland-water. She holds her breath, because Eliana is, unfortunately, not as dumb as half of her raiders and she should've never stuck together with her, but damn it if she didn't miss a normal woman around.