You honestly don’t think that Cuba already knows about his relatives? People critical of totalitarian regimes fly in and out of them all the time. Relatives of those fly in and out of them all the time.
99% of the time, the regime doesn’t want an international incident on their hands, and so they just keep an eye on them.
His wife’s cousin was already on the watch list, as are any Cubans who fled the island. They know who he is and what he is doing, they don’t need this column to find that out.
OK doc.