Apoorva Shukla, wife of Rohit Shekhar Tiwari, has confessed to the crime of killing her husband, the Delhi Police said on Wednesday, after her arrest from her Defence Colony residence

Rohit Shekhar was declared brought dead at a city hospital on April 16.

Additional Commissioner of Police Rajiv Ranjan said Ms. Apoorva had confessed to committing the crime. The case, so far, was being viewed as a case of sudden provocation as opposed to a pre-planned murder. She was unhappy with his relationship with Rohit and that was the motive behind the killing.

"There was an argument in the room between the two over his relationship with a woman relative . Soon the argument turned violent," Mr. Ranjan said.

Ms. Apoorva smothered him with a pillow after blocking his nose and mouth. After he died, she went to her room. "She did not try to destroy evidence," Mr. Ranjan said.

The accused is to be produced before court and police will seek her custody.

Ms. Apoorva was the prime suspect in the case while the police probed the alleged involvement of three persons, including her and two domestic helps. 

Three days after his death, his post-mortem report revealed that he was strangulated to death, after which the murder case was registered.