L'escalier de fer
A meek, mild-mannered man begins to suspect that his beautiful wife is poisoning him after he realizes that his acute stomach aches occur only after he eats at home. As a result, he investigates the death of his predecessor-- his wife's first husband.
Starring Laurent Gerra, Annelise Hesme, Nicolas Marié, Audrey Beaulieu, Anaïs Beluze, Jérémy Charbonnel, Yvette Férréol, Luc Gentil, Cédric Meusburger, Alexandra Morales
It's a crime and drama movie, and has a rating of 6.4 out of 10 from Imdb which is usually fine for this kind of movie.
Watch it here
Not found streaming from Saudi Arabia.