Rayachoty: In a shocking incident, a woman killed her sister's daughter-in-law and took the severed head to the nearby police station. The incident took place in the K Ramapuram village of Rayachoty in Annamayya district on Thursday afternoon. According to the reports, the accused identified as Subbamma and the deceased Vasundhara. It is learnt that Subbamma's son got married to Vasundhara a few years ago. Sources said that her husband died three years ago and she developed an extramarital affair with a person. Subbamma warned them but they ignored her warnings. Irked after their behaviour, Subbamma killed her after a heated argument and took the severed head to the Rayachoty police station in a polythene cover and surrendered before the police.