Question: My mother suffered from cancer, and the disease became so severe on 13 Ramadaan, 1411 A.H., causing her to break Sawm (Fast). She remained ill until she died on 11 Shawwaal, 1411 A.H. I do not know whether I should observe Sawm and give Kaffaarah (expiation) on her behalf. Please advise!
Answer: If the case is as you mentioned, there is nothing upon the mother because she is excused for breaking her Sawm. Moreover, she was not able to make up for these days until she died... read more here.