Rachel's daughter was raped by a boy at her school. He was arrested, bailed, and put back in his normal lessons, alongside his victim, the following day.
"Somebody who's been raped is already in a terrible place, but to be expected to be back in the same space as the rapist is just terrible," she told the Victoria Derbyshire programme. "It's re-traumatising - it's just a terrible thing to do to a rape victim."
The government says it is writing interim guidelines for schools to prevent schoolchildren being forced to share classes with pupils who have raped or sexually assaulted them, but campaigners say it is taking too long.
Rachel - not her real name - said her daughter's anonymity was compromised at an early stage - which made life especially difficult.
"Being in the same classroom as the person that's raped you is difficult enough, but when people in that room know what's happened and they're watching how you cope being in the same room as the rapist - that's just awful," she explained.