The heroine, who was abused by her mother, got help from the man who lived next door
I married her on a family register so she could be separated from her abusive mother
In less than a year, he dies while saving the cat, and the main character becomes a high school student and a widow
That’s the story
The man who liked the heroine was my ex-husband’s brother
Thank you for telling me the name of the writer
I searched it and as soon as I saw the cover of the book, this is it! I did.