What does it mean?

[rebbonk]

After she woke up, a woman told her husband "I just dreamed that you gave me a diamond necklace for Valentine's Day. What do you think it means?"

"You'll know tonight" he said.

That evening, the man came home with a package and gave it to his wife. Delighted, she opened it to find

Spoiler:

a book entitled "The meaning of dreams".