Accused Jagadish allegedly raped the minor, who is his neighbour in Daulapur village of Yalal mandal of Ranga Reddy, about four months back following which she became pregnant, they said based on a complaint lodged by the victim's mother.
The complainant accused Jagadish, a private employee, of raping the girl at his house initially and later two more times in an agricultural field, police said.
Yesterday, when she took her daughter to a hospital it came to light that the girl was 4-month pregnant.
The accused's mother-in-law Bhimamma was booked for abetment of offence under section 109 of IPC, an investigation officer said, adding that the duo were nabbed and being further questioned.