I'm touched by both your losses and I'm so sorry. I was not able to have my own children; However, my older sister was kind enough to loan me her kids a bunch so I'm a second mama to her kids. Not the same but it worked for us.
My favorite holiday activity is baking with the nieces.... Both my neice and DH neice spent many a holidays in my kitchen. They are grown with munchkins of their own now...I missed them today as I baked my treats...
Hope you have a wonderful holiday season with your families!!! Merry Christmas!