Teufel in Seide (1956)

The last day of a vacation at the sea, Thomas Ritter met two women: the shy and warm hearted Sabine and the rich Melanie. He settled with Melanie, who could help him with his career as a composer - but came to regret it much when she annoyed him with her unfounded jealousy and suicide threats during all the years of their marriage. When he finally overcomes his scruples and seeks refuge with Sabine, who he kept a friendship to, Melanie is found dead the next day, and it's arranged in a way that suggests Thomas as her murderer...