The German drama film ( Ein Fisch, der auf dem Rücken schwimmt ), released in 2020 , is a provocative exploration of grief and unconventional relationships. Directed by Eliza Petkova, the film premiered at the Berlinale 2020 in the "Perspektive Deutsches Kino" section. Plot Summary

So you seem to be saying:

Andrea becomes the object of desire for both Philipp and Martin, leading to a "destructive interdependence". The Conflict:

Andrea’s presence is initially meant to fill the emotional void left by Hanna, but the dynamic quickly shifts into an unusual and increasingly destructive love triangle Themes and Artistic Style The "Oedipus" Influence

Philipp and Martin are both mourning the sudden death of Hanna, their wife and mother.