Short answers, pulled from the story.
Maria Sophie Weber entered the world in October 1763 within a household where music was not merely a hobby but a profession. Her family moved frequently to follow musical opportunities before settling in Vienna following the burgeoning career of Aloysia Weber.
Sophie lived with her mother Cäcilia when Mozart died in December 1791 at age twenty-eight as the last unmarried daughter of the Weber family. She frequently visited the Mozart household to help Constanze care for her dying husband through those difficult days.
On the 7th of January 1807 Sophie married tenor singer and composer Jakob Haibel in Djakovar. The city now known as Đakovo in Croatia served as the location for their union while Haibel worked as the cathedral choirmaster there.
Sophie wrote a letter to Georg Nikolaus von Nissen describing the circumstances surrounding Mozart's death which helped prepare a biography of the composer. Vincent and Mary Novello interviewed her in 1829 during their journey to gather information about Mozart.
She died in Salzburg in 1846 at age eighty-three having survived all her immediate family members. Sophie outlived her younger nephew Franz Xaver Wolfgang Mozart by two years before passing away after living with Constanze until 1842.