Article continues below advertisementMary Trump, Donald Trump's niece, recently opened up about her experience working as a ghostwriter for her estranged uncle in a revealing interview with Monocle. The author and psychologist shared unexpected insights about their relationship and life at Trump Tower.Reflecting on their early bonding, Mary said, "It wasn't until I was quite a bit older, in my early twenties, that Donald and I started spending time together. He weirdly asked me to ghostwrite his second book.