Ann Altman has filed a lawsuit against her brother, OpenAI CEO Sam Altman, alleging that he sexually abused her throughout childhood over a period of nearly a decade.

The rest of the Altman family immediately pushed back on the lawsuit, saying the allegations are “utterly untrue” and stem from “mental health challenges” that Ann has faced for years.

“Annie has made deeply hurtful and entirely untrue claims about our family, and especially Sam,” writes Sam, his mother, and his two brothers, in a statement that Sam released on X.

Ann’s lawsuit alleges that Sam abused her from 1997 through 2006, beginning when Ann was three and Sam was 12 and continuing until Sam was a legal adult. The lawsuit, filed in a federal court in Missouri, says that Ann suffered “severe emotional distress” and has been unable to live a “normal life” as a result of Sam’s alleged abuse.

An attorney for Ann described the Altman family’s statement as an attempt to “divert attention away from the harm that they caused.” The attorney, Ryan J. Mahoney, said that sexual abuse can cause “mental health outcomes such as, persistent PTSD, depression, and anxiety.” He also said of Ann specifically that there is “no evidence that her own mental health has contributed to her allegations.”

The Altman family’s statement alleges that Ann has made conspiratorial claims over the years about various family members while demanding money from them. The family members say they have offered financial support and asked her to receive medical help but that she “refuses conventional treatment.”

“This situation causes immense pain to our entire family,” the family statement says. The family says they have “chosen not to respond publicly” when Ann has made similar claims in the past, but that they “feel we have no choice but to address this” now that she has filed a lawsuit.