Lyrics:

I saw Mommy kissing Santa Claus
Underneath the mistletoe last night.
She didn't see me creep
Down the stairs to have a peep;

She thought that I was tucked
Up in my bedroom fast asleep.
Then, I saw Mommy tickle Santa Claus
Underneath his beard so snowy white;

Oh, what a laugh it would have been
If Daddy had only seen
Mommy kissing Santa Claus last night.