The State Department has issued this statement:

Quote
The U.S. Interest Section is aware of this case and is in contact with local authorities to get more information. U.S. officials are providing all appropriate assistance to the family. Because of privacy reasons, we are unable to provide any additional information. One of the Department's highest priorities is the welfare of U.S. citizens overseas. This is particularly true for children, who are our most vulnerable citizens. The Department works with parents and foreign governments to resolve these difficult cases.
So, it looks like Joshua Hakken and his wife thought out their escape carefully, and carried it through to fruition. Cuba is not exactly the choice I would have made, but...

Onward and upward,
airforce