Melania did have a boyfriend named Hank Siemers there for a while. She appeared to have sleep overs with him, but had to end it to keep Barron in the will after trump became president. Before that, it was an open secret, and even now trump and Melania do not live as husband and wife.I don't think it has ever been substantiated by his parents, or announced to the public, and may be just kept a family secret, but it is believed by specialists that have observed him from video clips, that Barron has Autism. Of course that could be just speculation only.
But, it would explain why his Mom keeps him under such careful wraps. It would also explain why Donald Trump has had such an obvious estranged relationship with Barron, and never mentions his name, and is never seen with him.
Trump likes children that do not have Autism!
It is also believed by many that Melania has become A-sexual since birthing Barron!
Maybe Barron needs his mother's help to get through college. More likely, he really needs to get away from his mother in order to become an adult.