Female solo singer
She waits/serves her husband/boyfriend
Husband ignores her; in one scene he is in a lawn chair in the front yard, checks out s girl walking by, and tips his glass for more lemonade.
I believe some scenes show her inner thought of killing him (e.g., poison)
Near the end, he chokes to death
She dresses him and sleeps with him
At the end, she is in her car in the driveway (luggage visible) and drives away.