A 28-year-old man and his wife allegedly consumed poison after a verbal spat over the latter's obstinacy to meet her mother.
Police said Pawan Kumar was the first to consume poison on Tuesday evening and when his wife Anju Devi came to know about it, she also tried to end her life.
While Anju survived, Pawan died on Wednesday morning at a private hospital in Hisar.
The couple belonged to Milakpur village of the district and had come to Azad Nagar locality of the city to meet Pawan's elder brother Suresh Kumar, along with their two-year-old son.
"Anju called up her mother Nirmla Devi on Tuesday and said she wanted to meet her, to which Pawan raised objection. Following this, Nirmla and her son Sandeep Kumar came to see them in Hisar," a police official said.
Thereafter, the couple had a heated argument, following which Pawan allegedly consumed poison and was taken to a private hospital. In the meantime, Anju also consumed poison. While Pawan breathed his last on Wednesday morning, Anju is still in the hospital.
The police have booked Anju, Nirmla and Sandeep Kumar for abetment to suicide.