The accused -- name not disclosed -- and his friend, one Chand, allegedly raped the accused's 21 years old wife on March 4 at the couple's house in Madannapet area here, said inspector N Shankar of Kanchanbagh police station.
The victim lodged a complaint last week. Police today also arrested the accused's mother on the charge of criminal conspiracy as she was allegedly present when the crime took place.
The victim told police that after their marriage in February 2016, the accused left for Australia for higher studies.
On March 4, when he had returned from Australia, the accused forced her to have some slipping pills, and after she became drowsy, he and his friend Chand (first name not revealed by police) raped her, she said.
While the accused and his mother were arrested, his friend was absconding, inspector Shankar said. Further probe is on.