My Dad. I don't think he knows. I think he's doing the best he can, with it being Easter and his wife being on a very strict diet. He knows not to do the whole chocolate bunny thing, because Mom threatened him with fates far worse than death should he try and "surprise" her by doing it anyway. And he knows Mom's an avid reader, so it was cool that he got Mom the biggest, best-selling book of the day for a present instead.
She seemed happy with it...but I found it more than a little ironic that he gave her The Da Vinci Code as an Easter gift. *sweatdrops*