This sentence is part of a paragraph of a book titled The Almost Perfect Murder by Hulbert Footner. Here is the complete paragraph (emphasis mine):
My employer, Madame Storey, who knows everybody in the great world, had become acquainted with Fay, and through her I had met the girl. By degrees, I can hardly say how, Fay and I had become intimate friends. She brought colour and incident into my life. To a plain Jane like me, she was marvellous. I was the recipient of all her charming confidences—or nearly all; and as well as I could, I steered her with my advice amongst the pitfalls that beset a popular favourite. For one in the limelight she was incredibly ignorant of evil. And you could not bear to show her the ugly side of life.
What is the meaning of the word "incident" in the bold sentence?