Judicial Magistrate Sundari remanded the mother, Annalakshmi to judicial custody and ordered to produce her before the Udumalpet court tomorrow.
So far five persons have been arrested in connection with the case.
Kausalya's father Chinnasamy had already surrendered before the police.
Shankar (22) and Kausalya, married eight months ago despite opposition from their families. While waiting at the Udumalpet bus stand, they were attacked by a gang with sickles in full public view on March 13 in nearby Tirupur district, resulting in Shankar's death.
Later, she was taken to Komaralingam in Tirupur District to her in-laws' house, as she had expressed her wish to stay with them.S
The girl had earlier demanded that her parents be punished for murdering her husband.