Ok. (((hugs)))
Jacq, this is purely hypothetical, ok? If the passing of your relative was not in itself a trauma such as a car accident where you were also in the car, and you are experiencing more emotions than the normal levels of grief (anger, denial etc) there is a possiblity that this person who passed may have "abused" you or a sibling (in your presence) and the emotions arising are from that trauma.
Did this help?