Women says she wanted to purify her husbands penis.

An Adelaide women charged with murdering her husband by setting him alight, said she just wanted to "purify his penis", to cleanse him of the affair he had been involved with and she wanted him to stay with her.

Rajini Narayan, 46, has pleaded not guilty to killing 47-year-old Satish Narayan by pouring petrol on him and setting him on fire as he lay in bed at their Adelaide home in December, 2008.

"He was my hero, the man of my life, the love of my life," she told the court. "I was going to purify his penis, leave a mark there and he would remain with me. He would be mine." The accused said she had snapped, dousing her man's back with petrol when he called her a fat, dumb bitch.

The trial still continues.

insidetech.monster.com