Jacotin returned to Paris where she married Paul Dubreil on 28 June 1930. Paul Dubreil, whom Marie-Louise had met while they both studied at the École Normale Supérieure, had been awarded a Rockefeller scholarship in 1929 and at the time of their marriage was on a European tour which would let him study with the top mathematicians in Germany and Italy.
Jacotin ibabalik sa Paris kung saan siya kasal Paul Dubreil sa 28 Hunyo 1930. Paul Dubreil, kanino Marie-Louise had matugunan habang sila ay parehong aral sa École Normale Supérieure, had been iginawad ng isang Rockefeller scholarship sa 1929 at sa panahon ng kanilang kasal ay sa isang European tour na kung saan ay ipaalam sa kanya na pag-aaral sa itaas mathematicians sa Alemanya at Italya.