It isn't as if she did it just once.
Muslims commit 91 percent of honor killings worldwide. A manual of Islamic law certified as a reliable guide to Sunni orthodoxy by Al-Azhar University, the most respected authority in Sunni Islam, says that "retaliation is obligatory against anyone who kills a human being purely intentionally and without right." However, "not subject to retaliation" is "a father or mother (or their fathers or mothers) for killing their offspring, or offspring's offspring." ('Umdat al-Salik o1.1-2). In other words, someone who kills his child incurs no legal penalty under Islamic law.
The Palestinian Authority gives pardons or suspended sentences for honor murders. Iraqi women have asked for tougher sentences for Islamic honor murderers, who get off lightly now. Syria in 2009 scrapped a law limiting the length of sentences for honor killings, but "the new law says a man can still benefit from extenuating circumstances in crimes of passion or honour 'provided he serves a prison term of no less than two years in the case of killing.'" And in 2003 the Jordanian Parliament voted down on Islamic grounds a provision designed to stiffen penalties for honor killings. Al-Jazeera reported that "Islamists and conservatives said the laws violated religious traditions and would destroy families and values."
In light of all this, until authorities get the courage to tell the truth about honor killing, there will be many more such murders.
A couple arrested in Pakistan on suspicion of killing their 15-year-old daughter with acid say they carried out the attack because she looked at a boy.
The girl's father told the BBC that they feared she would bring dishonour on their family. Her mother said it was her "destiny" to die that way.
The couple were arrested in Pakistani-administered Kashmir last week.
The Human Rights Commission of Pakistan reported 943 women were killed in honour killings last year.
That represented an increase of more than 100 from 2010.
Police say that the incident took place in a remote village in the southern district of Kotli. They say that the case was brought to their attention by the couple's eldest daughter.
The girl, known only as Anusha, was found to have burns over 60% of her body. Her father Muhammad Zafar told the BBC what happened:
"There was a boy who came by on a motorcycle. She (Anusha) turned to look at him twice. I told her before not to do that, it's wrong. People talk about us because our older daughter was the same way," he said.
Her mother Zaheen described the aftermath: "She said 'I didn't do it on purpose. I won't look again.' By then I had already thrown the acid. It was her destiny to die this way."
Anusha's father is reported to have taken his daughter inside, beaten her and then acid was poured over her with the help of his wife. Officials say that the couple did not take their daughter to hospital until the following morning.
The couple say that an older daughter had already disgraced the family and they did not want to be dishonoured again....
Then clearly the proper response was to stock up on acid.