Lara Trump has gushed over just how "cool" her brother-in-law, Barron Trump, has become as he's grown into adulthood, while also shedding light on why the famously private first son is so rarely seen in public, Wonderwall.com can reveal. Eric Trump's wife, 43, said Barron, 20, is well aware he's become a full-blown social media "obsession" and hinted he's deliberately keeping a low profile as he focuses on life at NYU's business school while teasing his post-graduation plans.