Ethel Kennedy, the widow of U.S. Senator Robert F. Kennedy and the sister-in-law of the late U.S. President John F. Kennedy, has been hospitalized after suffering a stroke, her family announced on Tuesday. Kennedy, who is 96, suffered a stroke in her sleep last Thursday and was taken to an area hospital, where she continued to receive treatment on Tuesday, according to her grandson, Joe Kennedy III. “She is comfortable, she is getting the best care possible, and she is surrounded by family,” Joe said in a statement. “She is, as you may know, a strong woman who has led a remarkably fulfilling l…