The No.1 Ladies' Detective Agency

Why does Mma Ramotswe change her mind about Mr JLB
Matekoni?
Is this a good ending for the book, do you think?

Yes, it is a good ending because, I think a book should
have some romance.
It makes the reader's heart warm.
Mma Ramotswe had had a bad experience with her previous marriage, so
she didn't want to marry again. Her husband was violent and sometime beat her. He thought she belonged to him. He treated
her like she was a slave. So she could not have any hope
about marriage. She was satisfied with her job and life.
But when she went to South Africa alone for business and her
car broke down , she realized she needed somebody's help.
Mr.JTB Matekoni is a good man and she can trust him. Even although
she rejected him once, he still loves her. He always thinks
about her and he is honest.
So she becomes to love him. I think she can be happy with
him.