Sentence 1: Bertha lost her last friend when she was eighty years old. 
 Sentence 3: Strangers sometimes came to talk to her 
 Sentence 4:  But she didn't listen anymore 
 Sentence 5:  She was ready to go and eventually died too 
 Option 1: As she didn't have kids, she was alone in the world. 
 Option 2: Her kids were her world now.