What regret does Mrs. Pritchett have about her life in the novel, One Amazing Thing?

When Mrs. Pritchett was a young woman, she shared a dream with her best friend to own a bakery. Her friend's father saw the girls' passion and offered to transfer ownership to them gradually. Instead of following her dream, she marries Mr. Pritchett, a decision she later regrets. She constantly hearkens back to what her life would have been if she stayed in the bakery.