I think she had a relationship with a black man and then he was killed? I am unsure of that.
What I am sure of is that she is staying in a house where the owners are away. She leaves a note telling them she was there and some amount of money. She might add more money the longer she stays? Maybe she’s waiting for her boyfriend/husband/lover to come get her?
Saw this in the 70s, probably pre-75. TIA.