What is the name of the movie where the lead actress refers to her spouse as her "pull apart"?

My mom watched a movie, she thinks is stars Daryl Hannah and William Hurt (but she's not sure). In the movie, a professor (william hurt?) dies, his wife (Daryl hannah?) is left to learn to get on with life, with out him. She (the wife) describes what she believes, and calls him her pull apart. My mother would like to watch the whole movie, but can't remember the name. Can anyone help me out?