Frederick VII of Denmark
Du Puy had fathered a child during his time in Rheinsberg, but when he came to Copenhagen, he married Anna Louise Frederikke Müller in 1803, and had several affairs. He allegedly also had an affair with Princess Charlotte Frederica of Mecklenburg-Schwerin (Ludwigslust, 4 December 1784 – Rome, 13 July 1840). She was married to Crown Prince Christian VIII, and mother of King Frederick VII of Denmark. Prince Christian divorced his wife and sent her into internal exile in Horsens, while Du Puy was banished from Denmark.