LE VOLEUR D'ENFANTS (1991): French Teen Orphan Sexually Seduces Military Colonel

Here's IMDb's storyline for Le Voleur D'enfants (1991):

In 1925 Paris, the Colonel kidnaps unhappy or abandoned boys, providing them and his wife with comfort and joy in his rich mansion. Then things become complicated when he adopts a girl.

In the French film, Colonel Philemon Bigua and his wife can't beget; so, they platonically open the doors of their opulent mansion to Parisian orphans. 

However, after Gabrielle (Virginie Ledoyen), a nymphet, enters the mansion, she seduces the Colonel, which shifts their relationship from platonic to romantic.

How did the nymphet seduce the Colonel? 

In a sheer white gown, Gabrielle blocked the Colonel's path 

In a sheer white gown, Gabrielle whispered into Colonel bedroom's

In a sheer white gown, Gabrielle entered the Colonel's room

Ultimately, the Colonel could no longer resist the allure of the French nymphet. 

Virginie Ledoyen, was 15-years-old when Le Voleur D'enfants was released; thus, she may have been 14 when her totally nude, but non-sexual, scenes were filmed.

Lastly, Le Voleur D'enfants is based on a novel by Jules Supervielle. Consequently, I'm not surprised that Nabokov, as Boyd wrote in Vladimir Nabokov: The Russian Years,: "[...] found the poet Jules Supervielle 'terribly nice and talented,' and they quickly became friends. He translated some of Supervielle's verse into Russian [...]" And Stanislav Shvabrin of the University of North Carolina may have found a link between Supervielle's Colonel Philemon Bigua and Nabokov's Humbert.