Complex sentence: Egorova married Prince Nikita Sergeievitch Troubetzkoy (b.1877) on Nov.1,1917, but both her son and husband died, and she lost her fortune through mismanagement.
Split into simpler sentences: Egorova married Prince Nikita Sergeievitch Troubetzkoy (b.1877) on 1 November 1917. Both her son and husband died and she lost her fortune through mismanagement.