DH is tucking Elliot (age 7) into bed.
"Dad. I have an important question. I've been thinking. I think that Santa is like the Tooth Fairy. That he's not real. That he's really you and Mumma."
DH 'fesses up and then gives Elliot a wee lecture about how he's a big boy now because he knows the special grown up secret and he must not discuss it at school because you never know who knows and who doesn't. You can only discuss it with your family.
Mummy tucks Elliot into bed. "I hear you and Daddy have had a discussion about Santa."
"Yes", says Elliot "Now I know the grown up secret but it's ok because I won't talk about it at school. You can only discuss it with your family." 10 second pause. "Does Cait know?"
Cait, his sister, is 12!