You had a dream last night that your father in law whom you have never met died again In the same dreare your father who is alive died as well What does this mean?

This dream is expressing the same thing twice in slightly different ways. Essentially, the dream is about losing the source of your authority. A father figure represents security, assurance and authenticity as well as law, justice and "authority" in every sense. Something has happened, or you are worried MIGHT happen, that could remove your visible source of authority. It may be that for some reason you feel unsure about finding your own authority within yourself.