Wilhelm Ernst's first marriage to Princess Karoline von Reuss zu Greiz was not a success and she died, many believe a suicide. Kaiser Wilhelm II, who browbeat Karoline into her marriage, then urged Feodora to marry Wilhelm Ernst with similar results. Feodora, like Karoline before her, found court life at Weimar stifling and found refuge at an asylum she had founded. Unlike Karoline, Feodora lived a long life. Oh yes - the Kaiser boycotted her wedding. Her Wikipedia article is here.