She remained in Vienna singing
coloratura roles such as
Olympia,
Queen of the Night,
Oscar, and
Fiordiligi, as well as
lyric soprano roles such as
Cio-Cio-San. After she retired in 1911 upon her marriage to banker Johann Schuschny, she continued her career as a concert singer and teacher in Vienna for many years. She had one child, a son, Fritz Schuschny.[3]
^Donald Mitchell Gustav Mahler: the Wunderhorn years : chronicles and commentaries 1980 p404 "These were the most noteworthy productions in the first year. Mahler brought a host of distinguished artists to the Opera: Mildenburg, Gutheil-Schoder, Kurz, Foerster-Lauterer, Weidt, Forst, Weidemann, Slezak, Mayr, to name only a few."
^Morgenstern, Hans (2009).
"Forst, Grete", Jüdisches biographisches Lexikon, p. 238. LIT Verlag Münster.
ISBN3-7000-0703-5. This information also appears on a List of murdered Jews from Austria found in Namentliche Erfassung der oesterreichischen Holocaustopfer, Dokumentationsarchiv des oesterreichischen Widerstandes (Documentation Centre for Austrian Resistance), Wien. She is listed under her married name: Margarete Schuschny.
^His Master's Voice: the French catalogue Alan Kelly, Gramophone Company, EMI Music Archive 1990 p226 (Massé), pt I pt 2 LUCILLE MARCEL Obstination (de Fontenailles) GRETE FORST Nymphes et sylvains (Seulberg) Les Noces de Jeanette: Air du rossignol avec flûte
^Alan Blyth, Malcolm Walker - 1984 "Leo Slezak, with Grete Forst, is hypnotically beautiful, but are a dozen honeyed repetitions of 'Seligkeit', lovingly crooned, quite what this duet, in substance, is?"