Maurice van Ryn sat in the courtroom, slouching back in his seat, his hand beneath his chin, calmly looking ahead.

Van Ryn, the former head of Bega Cheese, who has admitted 12 child sex offences, did not once look towards the young woman talking about how he shattered her life.

Maurice van Ryn is now taking medication to suppress his testosterone levels.

"He has stolen from me my choice to share my body with someone for the first time," the woman said, in a strong and even voice.

"I'm so angry ... it wasn't his to take.