Aside from the probability of osteoporosis, in fact Sara's minimum age at her moment of death is around 47 (middle age, close to old age by DnD's human standards). Since everything points out that she was younger than Eugene, she couldn't be more than 79 when she died (venerable age).
DnD humans (without magical augmentation) live up to 72-90 years. That means Sara could have died of old age, depending on how much younger than Eugene she was. If so, no Rezz for her. If not, she would probably not want to go back anyway, since she's pretty happy where she is.