So sorry that you did not receive anything for Christmas this yr OP.
I would be sad if I had received something last yr but not this.
Perhaps they are not happy w/some aspect of your work this past yr.
Or like another person suggested - maybe they did not get a bonus this yr at their own job?
Could it be possible that they intend on giving you more money this month?
Though this likely isn’t the case.
Unless they are an excellent family in other ways & they have given you extensive benefits, etc., I would consider finding a new family.
Hopefully one that will appreciate all that you do + more!
Good luck.