Woman
***SPOILERS***
Is the woman at the start who's husband was killed at the star the same one who's house Angelo stays in and accompanies on the trip? If not, who plays that woman (the one who's husband was killed at the start)?
Completely different woman if I understand your question correctly. The main character he travels with is played by Juliette Binoche.
The woman whose hisband is killed at the beginning is a character named Carla. She is played by Laura Marinoni.