Which causes tension and he's being snappy towards Jess and Dean's all "Dude what the fuck?" because he's hurting her and Dean hates seeing her cry. Only because of her HORMONES and only the first time, the next time he's snappy and scared she rips him a new asshole and basically forces him to tell her WHY he's acting like such a DICK.

Oh, and is this a biblical apocalypse or a zombie apocalypse?