So what became of this "nepotism clause"

[WePurrsevere]

17. There are excellent reasons...

for anti-nepotism laws in government. I would argue that, court ruling for a spouse aside, the spirit as well as letter of the law has been violated in Trump appointing any of his children (incl in-laws) to official positions in the WH.

IME a spouse is also not quite the same as other relations since spouses are often seen as an extension of each other to a degree so there's a certain amount of vetting of the candidates spouses. There's not so much, if any, of their children since we normally don't think of them in quite the same way.

Beyond legalities it's simply not a good idea. It's one thing to involve your children in a regular family business, it's a very different thing to treat our gov like it's your business.
Apparently the case isn't cut and dried to others either:
http://www.npr.org/2017/01/05/508382236/trump-relatives-potential-white-house-roles-could-test-anti-nepotism-law
http://www.salon.com/2017/01/10/no-consensus-on-anti-nepotism-law-and-kushner-appointment-2/