 Sophie Piper was known for her love life in contemporary high society life.In 1779, she had a relationship with the Spanish envoy marquess Liano y las Qanchas, who at one point lived at Ängsö Castle with her and her spouse, and later with the French envoy count Louis Claude Bigot de Saint-Croix, whom she shared with Eva Löwen, while her spouse was in turn the lover of Ulla von Höpken.Sophie Piper is known to be one of five women to have been a member of the Freemasons in Sweden during the 18th century