It's hard to say for sure. Maybe it was a desperate act for survival, or maybe it was a plot twist designed to shock and surprise readers. Maybe the neighbor had something the woman needed desperately and this was her extreme way of getting it.
This is a rather odd and extreme situation. Maybe it's part of a dark fantasy or horror story where some supernatural or crazy event occurs.
Well, it could be part of a surreal or symbolic story. Maybe it represents her consuming something that destroys or changes her life in a profound way. Or it could be a result of a magical or fantastical event.
Possibly, they got lost in a mysterious place and couldn't find their way back. Another reason could be that they were abducted by aliens or involved in a magic spell that made them vanish.
Maybe the characters had a falling out or something happened that made it impossible for them to be together. It could be a tragic or mysterious ending.
It could be a serious medical condition like a hormonal imbalance or a reproductive disorder. Maybe she has an underlying issue with her uterus or ovaries.
It could be to symbolize a cleansing or a new beginning. The rain washing away the past and opening up possibilities for change in the story.
There could be several reasons. Maybe she has experienced some kind of trauma like being harassed on the street before. It could also be that she has social anxiety and is afraid of interacting with people outside. Another possibility is that she has received threats and is in fear for her safety.
Maybe she was abused by him and couldn't take it anymore. Or he was cheating and she snapped.
Perhaps it's a story of cultural exchange. The young wife, coming from one cultural background, and her black neighbor from another. They share their traditions, for example, the young wife shows her neighbor how to make a traditional dish from her family, and the neighbor teaches her some unique cultural dances or music. This enriches both of their lives and broadens their perspectives.
Perhaps she is attracted to the neighbor's different personality or lifestyle. Maybe the neighbor represents something she desires but lacks in her own marriage, like a sense of adventure or a more carefree attitude.
It could have been due to deep-seated jealousy or a perceived betrayal. There could be many underlying factors that led to such a tragic event. Maybe the woman was mentally unstable or under the influence of drugs or alcohol.