What Materazzi Said to Zidane

Ok, so following up on my multi-week obsession, I have a reasonably authoritative answer to this question.

Here's what happened. Materazzi pulled on Zidane's shirt.

Zidane said: "If you want my jersey so much, you can have it after the game".

Materazzi said - "I'd prefer your sister".

Bingo.

Sounds plausible to me.