I am looking for a movie and song from this movie

I have seen this movie more than 40 years ago.
A higher mid-class lady travels to the Balkans, falls in love with young local guy,
but the older men cannot allow this and kill the young guy.
After that she returns to Paris and poisons her family.
The movie begins with a song that played on vinyl disk:
“The early morning sunlight gentle touched them..”
A belive this song was played by a well know american country singer (a lady).