Dear Nadja,
The personal significance of the dream to you is more relevant than my input. However, I was wondering if you have or may in the future uncover or expose something about your grandfather or come into conflict somehow with his beliefs? Have knowledge of something you feel should rest in peace & not come to light that involves you or grandfather or something you have in common? Exposing an issue laid to rest? Not wanting to face it?(dont mean necessarily something bad, we all have things we or other family members keep to ourselves). The fact that you feel its not OK to do this suggests some personal internal conflict perhaps? Anyway, thats what popped into my mind.
peace & joy,
holobon