Princess Birgitte of Prussia, nee Dallwitz-Wegner committed suicide in November, reportedly due to the depression after the death of her husband.
She was born in Kitzbuhel, Tirol on 17 September 1939 and married morganatically (becoming his second wife) in Bad Soden on 23 June 1982 Prince Michael of Prussia (1940-2014) [son of Louis Ferdinand, Prince of Prussia (1907-1994) & his wife, Grand Duchess Kira of Russia (1909-1967)]; he was previously married (also morganatically) to Jutta Jorn (b.1943). They divorced the same year he married Birgitte and had two daughters: Michaela (b.1960) [married to Jurges Wessoly (b.1961)and mother of Maximilian (b.2000) & Marie Charlotte (b.2001)] & Nataly (b.1970) [single and childless].
Birgitte and Michael didn't have children together.
Sources: Brigitta von Preußen: Die Trauer war zu groß: Sie hat sich das Leben genommen | BUNTE.de
Descendants of German Emperor Wilhelm I