Frederica and her children were kept under guard at Haga Palace. The royal couple was initially kept separated because the coup leaders suspected her of planning a coup. During her house arrest, her dignified behavior reportedly earned her more sympathy than she had been given her entire tenure as queen. Her successor, queen Charlotte, who felt sympathy for her and often visited her, belonged to the Gustavians and wished to preserve the right to the throne for Frederica's son, Gustav. Frederica told her that she was willing to separate from her son for the sake of succession, and requested to be reunited with her spouse. Her second request was granted her after intervention from queen Charlotte, and Frederica and her children joined Gustav Adolf at Gripsholm Castle after the coronation of the new monarch on 6 June. The relationship between the former king and queen was reportedly well during their house arrest at Gripsholm.