Police arrested an 18-year-old resident of Phase 3B1 along with his parents on Tuesday, a day after they were booked for "misbehaviour" with a 14-year-old girl.
Those arrested were Gaurav, his father Amarinder Singh and his wife Nidhi.
The trio was booked under Sections 354 (assault or criminal force to woman with intent to outrage her modesty), 506 (criminal intimidation) and 341 (wrongful restraint) of IPC.
Gaurav had allegedly passed lewd remarks at a Class 9 student while she was returning home from tuition class. As she objected, he misbehaved with her. The victim then called her mother to the spot, but Gaurav and his parents, who too had reached there by that time, misbehaved with them.