The incident occurred around 11.30 p.m. Monday near Fatehpur in the district, some 100 km from here. The woman was a resident of Chuvas village.
"During preliminary investigation, it has come to light that Radha Devi was involved in a relationship with 35-year-old Manoj from her village. She left home with her sons, five-year-old Manyank and three-year-old Pankaj, Monday morning," a police officer told IANS.
The officer said that the woman's husband Dhawarmal lodged a missing complaint with the police Monday afternoon.