You share more than you think with your mother and grandmother...

Did you know that when your grandmother was five months pregnant with your mother, the egg that would eventually become you was already present in your mother's womb?  That means, before your mother was even born, your mother, your grandmother and you all shared the same biological environment.  Whatever intense feelings (grief, trauma, etc.) affected your grandmother likely affected your mother and you.  

Mark Wolynn - Family Constellations