She took the extreme step after her husband failed to buy her a 'mangalsutra' (wedding necklace), the police said.
"I had promised to buy her a 'mangalsutra' in a couple of months after I made arrangements for the money," her husband said.
The incident happened when he was out of the house getting a haircut at a saloon.
The dead bodies have been sent to the hospital for post mortem.
Statements of the woman's parents would also be recorded as part of investigations, the police said.