Whilst in Copenhagen she also began a relationship with a French merchant Berthold Dieden who paid for her travel to France, as well as becoming friends with the journalist and artist Iwar Donnér.

[1][3] After the end of the first world war Bjerne began travelling again, and met the doctor Léon Biaudet, with whom she settled in Lovissa, Finland from 1922 onwards.

Her works, which often focused on behaviour considered "immoral" at the time, being relatively outspoken about sex,[5] were often interpreted as being autobiographical, meaning that Bjerne herself was seen in a negative light.

A number of her works were openly autobiographical, including Lustjakten (The Yacht, 1944), Livet väntar dej (Life Awaits You, 1955), Den glada otryggheten (The Happy Insecurity, 1958), Botad oskuld, (Cured Innocence, 1961), and Sardiska stigar (Sardinian Paths, 1963).

Their house, now known as Villa Biaudet, became a scholarship-home for various recipients, including Bengt Ahlfors, Claes Andersson, Per Hakon Påwals, Johan Bargum, and Joakim Groth.