Well... she was more acknowledging that he would do that whether she told him not to or not and figured since she would be dead she didn't care, she was requesting that he burned her body instead of burying it in the vein hope she would be reincarnated. But if he wanted to believe otherwise she did not mind.

She was just glad he had said yes, "Tha..." She didn't finish her word though as she found herself struggling to breathe, for a moment everything was pain and then her eyes glazed over and she was still.