Calm down.
Niki is already a part of this troll world. I think he knows that at this point, so it doesn't matter whether he shares pics of her or not. Their lives are too entwined together, to just hide her from the world on social media, plus when he posts pics of her: He genuinely believes that he's showing off something to be proud of. And he uses photos of friends as tools to show and signal to others that he's normal and people like him.
Family is a different thing, altogether. They don't really count as a network that can earn you industry clout, and unless your family is rich or a member of a marginalized group; they can't get you anything, both in terms of financial access or social credit. By posting them, you're only risking their chances of being dunked on.
This group had to try to dig up photos of whom we believe to be family members (the one fat waterhead that gets posted around here is believed to be a brother or family member, and someone thought they had found the FB of another brother wearing a fedora and goatee or something just as gay), and it's still not sure of familial relation, if any. I don't even think we really know what his parents truly look like, uncles, aunts, etc.
He obviously plays his family close because he's either protecting them, or he just isn't interested in sharing them because they can't do anything for him. They also might just hate each other, or maybe he crushed them to death under his gunt, when he hugged them at Christmas years ago
Niki doesn't really count.