She ran the family business alongside her husband Adolphe Lafont, and was actively involved in social and cultural causes.

They welcomed young Swiss girls who came to work in Lyon, and her father was very active in the Protestant community.

At first, she was the cashier at the store on rue de La Guillotière, and from 1906 onwards, although she didn't have the official title, she quickly became financial director.

[R 3] In 1919, when her husband had bought land to build his new factory in Villeurbanne, and as it was customary at the time to live next door to his factory,[3] Pauline Lafont guided and influenced the designers in the technical construction office responsible for drawing up the plans and designs that were finalized in 1921.

It incorporated all the modern comforts of the time: freight elevator, pass-through, garde manger and garbage chute in the kitchen; automated watering system on the roof terrace garden; fold-away bed and coat rack in the servants' apartment.

The interior featured a painted frieze by R. Burretta, bas-reliefs by Cavina and marble decoration by Ernesto Giavina; several stained-glass windows were designed by Joannès Mayosson, and others by Jacques Grüber of Nancy, who came from the Lafonts' former apartment in Lyon.

[R 2] During World War I, she welcomed convalescing allied soldiers to the Lafont family estate in the Valromey village.

[5] Realizing that there was no kindergarten for young children, and wanting to get involved in the social policy of the city of Villeurbanne, which was developing a hygienic policy at the time, in 1925 she donated a plot of land adjacent to her villa to the town hall to set up a garden reserved for children under the age of six.

[3] Her daughter Marcelle became a pilot, as well as a chemist, chemical engineer, member of the French Resistance and politician.

[R 1][1] In 1935, Pauline's brother-in-law Ernest Lafont set up the Lyon La Doua radio station, and looking for volunteer hosts, asked his sister-in-law to take charge of the women's and children's programs.