As I mentioned previously, Margaretha is the twin sister of Prince Jean of Luxembourg. She is the younger sister of Princess Marie-Astrid and Grand Duke Henri. As a young woman, she studied in Belgium, Luxembourg, the United Kingdom, and the United States. In 1982, she married Prince Nikolaus of Liechtenstein. The couple have been blessed with four children: Leopold (b. 1984), Maria-Anunciata (b. 1985), Marie-Astrid (b. 1987) and Josef-Emanuel (b. 1989). Sadly, little Leopold was born prematurely and died the same day.
Nikolaus and Margaretha live in Brussels, where the Prince is serving as resident Ambassador of Liechtenstein to Belgium and the EU (and, also, as non-resident Ambassador to the Vatican). Apparently, Margaretha is the author of a book, Family Values, described by the Association of Catholic Women as "a moving account of the joys and stresses of being a parent in the modern world."