The movie is about a man named Geno who marries the sister of his dead wife Juanita. The family is Italian and the woman's name is Rosa and her husband is always comparing her to her dead sister. It is an older movie maybe from the 50's.

The 1957 flick Wild is the Wind (http://www.imdb.com/title/tt0051193/usercomments) matches at least some of your remembered details.