What is the main conflict in Rainbow Valley by L. M. Montgomery?

This story takes place in the conservative community of Glen St. Mary in Nova Scotia. The story unfolds when the town busybody, Mrs. Marshall Elliot, who everyone calls Miss Cornelia, is on her way to Ingleside, the residence of Anne Blythe and her husband, Dr. Gilbert Blythe. The Blythes had just returned from a long vacation to Europe. Their four eldest children were sent to Anne's childhood home in Avonlea and Green Gables. The two younger children stayed behind with Susan, the family's nanny. Miss Cornelia was anxious to see Anne but also to gossip about the new Presbyterian minister.