Why cant Martha Cratchit hide from her father for very long

Martha Cratchit can't hide from her father for very long for she cannot afford to witness the upset expression of her father knowing she is not around. So she pops out of somewhere to surprised her father which actually caught off card. It was Christmas and everyone must be complete and in festive mood especially for Christians because it is the season to be happy and jolly. It is also the time to give and forgive and be nice to everyone regardless of how they treat us.