"While many presidential wives have taken advantage of their platform to promote an agenda close to their heart, friends of Melania’s say the First Lady isn’t particularly devoted to any charity or cause as is typically expected among the women of Manhattan’s wealthy elite.

“She was passionate about… Well, I can’t think what she was passionate about,” said old friend Lisa Bytner when Vanity Fair asked where Mrs. Trump’s deepest interests lie."
http://www.alternet.org/news-amp-politics/melania-trump-profile-says-shes-frosty-ivanka-and-never-had-any-interest-first