Some could say they Can see similarities between Barron & Diana when they were younger. Although it would be a stretch to say Diana is Actually Melania and Barron is her son. DNA is honestly the only way to prove if Diana and Barron are related. Frankly, I think playing head game like this is not funny at all. There are children involved in this game being played and frankly, children should not be used as pawns like a game of Chess.
Plus, I do not believe President Trump and First Lady Melania would allow Barron to be placed in a situation which might in the slightest way cause him to question them or their parenting of him. Neither President Trump or Melania seem to be the type of person to place their son in the middle of a questioning situation. There is absolutely no doubt Barron is their #1 concern.