Am I turning into a milf?!

I was picking my teenage boy up from school and all his friends kept looking at me and saying "now thats a milf."
I don't know what a milf is, is it like some kind of sexy fairy person? How do you turn into a fairy? Do I grow wings and turn really small? is the change painful? will i stay like that forever?
will the transformation require spells, or what?
Do you have to be bitten by a milf to become one?

Please help me I'm SO confused!