“ The marriage, only accepted by Wilhelmina under threats from her father and with a view to lightening her brother's disgrace, proved at the outset a happy one, though it was clouded at first by narrow means, and afterwards by the infidelities of the future margrave with Dorothea von Marwitz, whose ascendancy at the court of Baireuth was bitterly resented by Frederick the Great, and caused an estrangement of some three years between Wilhelmina and the brother she so devotedly loved. ”

“ She acted as eyes and ears for her brother in southern Germany until her death on the 14th of October 1758, the day of Frederick's defeat by the Austrians at Hochkirch. Her only daughter Frederica had contracted in 1748 an unhappy marriage with Charles Eugene, duke of Württemberg. ”