Yes, it can be. Reading too many novels can have both positive and negative impacts. On the positive side, it can expand her vocabulary and imagination. But on the negative side, she may become isolated from the real world. She could be spending so much time in fictional worlds that she forgets to engage with the real people and situations around her. This can lead to difficulties in adapting to real - life situations and may also affect her mental health in the long run if she becomes too detached from reality.
It might be. If she reads too many novels, she may neglect other important aspects of her life like her studies, work or social life.