Police cracked the Alwar murder case in which five members of a family, which include three kids, husband and a nephew, were found murdered with their throats slit on Tuesday night.

Cops have arrested Santosh, 36, alias Sandhya, wife of Banwari Lal along with her lover Hanuman Jat , 25, and two hired killers Kapil, 20, and Deepak , 19.

Alwar SP Rahul Prakash said, "Santosh was having an affair with Hanuman. Both used to learn taekwondo together and later ran a coaching centre too. This association led to their affair for two and a half years. She used to visit him at different places including Udaipur and Jaipur.

Both began to work out how to go ahead given her family ties and first thought of killing her husband Banwari."

However, she felt that just by getting rid of her husband, she won't be able to get her desired freedom of a new life. So, she planned to kill her children too with the help of her lover .

She drugged her husband and three children who slept on one floor and went to sleep in another room after letting three killers enter the room for murder.

She later pretended illness and was admitted to the hospital.

Police immediately found it to be a case of friendly entry and on interrogation of family members and analysis of calls made on cell phones helped them cracked the case.