The attacker is believed to be mentally unsound.
He had knocked her unconscious in his car, taken her to an oil palm estate before pouring petrol and setting her on fire.
Private clinic doctor says patient didn't want him to contact his parents or to be taken to a hospital.
Two groups of motorcyclists throw fire crackers at each other just as New Year church service ends.
Tan Eng Kian, 36, is in critical condition after suffering 70% burns caused by the fire from a cigarette lighter.
The 44-year-old victim was set on fire after her husband allegedly hurled a burning bottle of petrol at her over her refusal to reconcile with him.
Police say man threw bottle containing torched petrol at his wife on May 26 as she was cleaning chicken behind her house.
Seven people detained after victim admitted to hospital with burns and injuries.
Father says his son, a divorcee, was a mental patient, say police.
Consumer group says liquid nitrogen used so one can exhale smoke from the nose and mouth, is not suitable for consumption.
Her husband, who was also injured, is still in hospital.
Incident occurs during house fire at Kampung Tanjung Bendahara, Alor Star.