Do I tell my actual due date?

My due date is Nov 5th and that is my nieces birthday as well. My niece was born with HLHS and passed away when she was two months old. I'm worried about telling my brother and sister in law that my due date is her birthday. I don't know if they will look at it as a blessing or if it will upset them. 
I know it is highly unlikely that I will actually give birth on that day but I still am worried about telling the due date. 
Any thoughts?