HUH?????????????????? ????????

If two people who were this closely related met each other, it's quite plausible that they would be strongly attracted to one another without knowing why, at least that's what some recent research and a lot of anecdotal evidence suggests (the so-called Genetic Sexual Attraction effect). What is totally unbelievable is the string of coincidences that allow this to take place in this movie. The odds of either of the two major events in the sequence occurring are slim. The chance that both could occur -- Faber first encountering Hencke's brother and traveling with him to Mexico at the precise time of Hencke's suicide and almost immediately afterwards encountering Hencke's stepchild who is his own genetic daughter -- is frankly unbelievable. To make matter worse, it was unnecessary. I don't really see what the whole Mexico episode contributes other than to weaken the plot's plausibility. The necessary exposition could have been handled in some other, less conspicuous way. Obviously, however, the role of coincidence is a major theme in the movie as Faber keeps talking about it throughout.