SPOILER
if you want to know, she doesn't sadly.
oops sorry wrong comment
(Person who did translation here, I love answering questions like this) I put "mutilate" as that was the most literal translation of the word. Medea really only told her that her body has to be destroyed in some way, and to "destroy" a body is to mutilate it. If you want spoilers, well....
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Anakin does burn her body. That's the idea he gets from Eris' request.
Ooooooo.....
Do they know a thing called burning a corpse..... Why bother mutilate......
Such idiocy......