The story is not a good study of characters. All of them are almost caricatures. When the existential problem between Erik and Ana arises, both behaves in a way too much elementary, taking in account the gravity of the situation which is going on. More precisely (1) Erik is absolutely incapable to realise that he is ruining the emotional life and the self respect of the woman with whom he has been married and living in a pleasant way during at least fifteen years. A woman who proved to be generous when she accepted that Emma could live with the community, and who had probably fantasies of living a ménage à trois, along with Erik and Emma, thing that I think reasonable and human, considering what was going on. Erik sticks with Emma as if he hadn't any responsibility with regard to Anna feelings. (2) Anna is incapable to react in time to rescue her dignity which is being hurt by the irresponsible behaviour of Erik. The rest of the characters manifest themselves very poorly with respect to the crisis between Erik an Anna. Except the young Freja, daughter of Erik and Anna which is the only one capable to say that her mother must leave the community and seek for a new life. In short, Erik who is almost a pivot of the whole story, behaves - in the light of existentialist philosophy - as an individual with bad faith. I would add also, on my part, that he is a kind of mediocre individual.
