Faut ce qu'il faut (1946)

A young man files for divorce ,so as to be able to marry his new love who is pregnant by him;unfortunately ,he has to go to war and to leave his fiancee behind,just after she gives birth to a baby girl. The baby's godfather suggests he marry her (marriage in name only) and thus she will get an allowance as a drafted reservist's wife.The plot thickens when an authoritarian Concierge falls in love with the helpful man .