What?!? You mean Santa's not real?
I'm crushed!

Breathe through it... Don't worry, stuff appears at the end of my bed every Christmas, and
I haven't bought it, so it
must be Santa.
Actually, the Santa thing went on much longer than usual with us because I was a late baby, so by the point at which it might have faded away, it was actually a fully-fledged family tradition for the older ones. No big presents from Santa, but we went on doing stockings every year. Then when I got married, DH, whose family had given it up when his youngest sibling was about 8, loved the idea and joined in.
When the Elder Chick was about 5 and the younger one 3, my FIL, who has the tact and diplomacy of a steam-roller, said something loud in their hearing about "Oh, does Santa still come in your house? Do they still believe..." We all glared daggers at him, and I said crisply that Santa continued to visit me and always had. He grasped that he had said
something untoward, but not what, and added weakly, "oh, I haven't had a present from Santa in years."
My MIL looked over the top of her spectacles at him and said drily, "That's probably because you haven't been good." Ah, I loved that woman.