I remember 1 movie from my childhood, wanna find out it's name...

here are some things i remember: main protagonist is a woman with blonde (yellowish) long straight hair, blue eyes...
somekinda man with her (husband/dad/brother...dunno?)
and most important (probably antagonist) a dark haired girl named Jessica, she was mostly seen with dark hair (black), and naked white body, she used to get naked everytime i saw her, i remember scenes of her naked with a man, naked in the bathtub and found dead naked, taken out of the water, as if her dead body was a statue.

next, i remember that blonde woman being punched with a big flashlight by that man who was once good, but became crazy in the end, he hit her and she had blood all over her head and face, anyways, she got rid of him.

the film ends with that blonde woman with her 3 children, visiting their father's grave and lighting candles there for him.

whats the name of the movie?