Well, I just went back and re-read the book's entry on the card, and she describes it as a "nativity" scene, without capitalizing the word, and goes on to say "a woman" is in bed nursing the child while "the father" cooks food on an open fire.
So I don't see this as Mary, Joseph and Jesus or this being a Wise Man, I just see it as being a normal family scene. The only way I can associate it with the Wheel of Fortune, I guess, is by seeing the new baby and thinking of it as "life goes on" and one generation of people is leading on to the next, new one.
Apocalipstick, I like your association with the birth of Jesus changing the fortunes of the world. If this is Jesus, Mary and Joseph, then your interpretation is probably right.