Yena X Hitomi true end, while Jin finally gives in to his animal nature (humans are animals too) and forms a harem out of everybody else. And maybe also Hitomi.
I mean, it's already been explicitly pointed out that humans are one of very few monogamous species, and although the dynamics might get weird, having a massively polyamorous relationship in this 'pack' isn't out of the question. Well, if Jin can overcome his distaste for the idea.