Hodet over vannet[1993] aka Head Above Water

http://www.imdb.com/title/tt0107121/

Einar and Bjørn leave Lene on the island for a fishing trip. Then her former lover, Gaute, drops by unexpectedly. Drunk, he sleeps in the double bed. Lene sleeps on the couch and wakes up when the men come back. She tries to wake Gaute, but then discovers that he's dead.

Remade as Head Above Water (1996) http://www.imdb.com/title/tt0116502/

Hardcoded English subtitles.