[2] Her only brother was Alexander Ferdinand, 3rd Prince of Thurn and Taxis, whose son Karl Anselm would marry Marie Auguste's only daughter in 1753.

They had four surviving children: Their ten-year marriage was turbulent, and they were generally felt to be each other's match in every way (as both were masters of intrigue and secret diplomacy).

[2] Marie Auguste's husband died suddenly on 12 March 1737 on the eve of his departure on a military inspection tour.

Rumors of a possible pregnancy became so widespread that the privy council began an investigation; the captain was discharged and she was forced to stay in Brussels for five months (beginning in April 1740).

[5] For instance, she was unable to prevent a disastrous alliance with Prussia that would leave Württemberg exposed at the outbreak of the War of the Austrian Succession.

In 1748, she encouraged her eldest son, the reigning Duke Karl Eugen, to enter into a marriage with the Hohenzollern Elisabeth Fredericka Sophie of Brandenburg-Bayreuth, a niece of Frederick the Great.