As time has worn on, the potent insta-lust they felt in those first days fades some and the weight of a new, burgeoning romance falls on their shoulders. Adding in a new wrinkle, doubts form that threaten their chance at forever.
They all soon discover that a relationship demands work on all sides. It will take commitment to propel them from the lust of their animal mating to the love they all sensed was possible from the start.
Unless secrets tear them apart first.