A family of one is as good as a family of none. Each voice it holds adds yet more richness and echoes to the depths of the cave, and it's often best to take a step back and listen to the song a family makes as a whole.
She has the day shift; he guards the night. One pegasus, one thestral, just trying to make things work. They've known each other since childhood, so meeting the family shouldn't be quite such a big deal. But then the family tree got involved...