Jyoti's body was recovered last night from the river, after her father lodged a complaint with the police.
The victim's husband Rajesh allegedly threw acid on her on July 2 and later killed her, and threw her body in the river with the help of his father Ram Jatan, police said.
Jyoti, who had delivered a baby about 20 days back, had objected to her husband returning to work in Mumbai over which they sparred on the fateful day, police said.
Both the accused have been arrested, they added.