Virtual World: Being The Protagonist's Mother

I am a web novel author. One day, I found myself transported into my own novel. As the mother of the female protagonist, I diligently pushed the plot forward. After the protagonist suffered through a series of hardships, including the death of her family, friends leaving her, and being tortured, I finally wrote a happy ending. I returned to the real world feeling relieved, but then I saw a farewell letter from the protagonist addressed to me as "Mother." In the letter, she asked if the suffering she endured in the story was considered art in my world.