my fiancee has been out on ss dissibility due to a major automobile accident which rendered her unable to work. She is now 38 yrs. old this happened when she was 19. She collects under her deceased fathers number but her step mother and her half sister were collecting but since have stopped collecting. My question is Karolyn has not received any increase in monthly benefits shouldn't she have received any. Her step mother divourced her father before he passed and her half sister is now 23 years old.