I'm sure we'll be invited for Xmas with relatives this year now that we have a baby, but my fella and i have already decided we want to spend Xmas day alone with our son. (It's our 1st Xmas with baby, and 1st Xmas in our house)We don't want Xmas Day visitors either, but we'll take our son to visit family Xmas Eve and Boxing Day instead. We're not being anti-social (honest!) just want this one year to be special and private.
How do we refuse politely?