Salzman went from taking classes to teaching them, she wrote in her letter to the court, and in 24 months she went from an entry-level position to a high-level executive.

"I was 23 years old, and I really thought I was helping change the world," she wrote.

Her mother told the court that introducing her daughter to Nxivm and Raniere is one of the most regrettable things she has done.

"I am responsible for Lauren being before you, having endured arrest, prosecution and successful cooperation, and now facing her own judgment," wrote Nancy Salzman, who pleaded guilty to one count of racketeering conspiracy and is scheduled to be sentenced September 8.

For about two decades, Lauren Salzman went deeper into the group and her relationship with Raniere, which lasted for 17 years.

She testified that she stayed in it because she wanted children and Raniere repeatedly had promised they would have a child together.

"Over time, I have witnessed him gain control in countless others' lives and exploit them for his own ends," Lauren Salzman wrote.

Correction: An earlier version of this story incorrectly listed Salzman's sentence, based on information from the US Attorney's Office.

Salzman has been sentenced to five years of probation and community service.