Complex sentence: After Daisy's death, Susanna stops feeling sorry for herself and in the next few weeks, she even begins to cooperate with her doctors and responds to her therapy, expressing her feelings through writing and painting.
Split into simpler sentences: After Daisy's death, Susanna stops feeling sorry for herself. In the next few weeks, she even begins to cooperate with her doctors and responds to her therapy, expressing her feelings through writing and painting.