The engineer at the heart of the upcoming Waymo vs. Uber trial is facing dramatic new allegations of commercial wrongdoing, this time from a former nanny.

Erika Wong, who says she cared for Anthony Levandowski’s two children from December 2016 to June 2017, filed a lawsuit in California this month accusing him of breaking a long list of employment laws. The complaint alleges the failure to pay wages, labor and health code violations, and the intentional infliction of emotional distress, among other things.

Yet in this unusual 81-page complaint, Wong also speculates about a large swath of Levandowski’s personal and business dealings. She reports a great variety of details, including dozens of overheard names, the license-plate numbers of cars she observed at a Levandowski property, and an extensive list of the BDSM gear she claims he kept in his bedroom.

Though the lawsuit contains some obvious inaccuracies—such as stating that Levandowski is a resident of Oakland County, California, which does not exist—Wong’s claims raise new questions about Levandowski’s business conduct. In her complaint, Wong alleges that Levandowski was paying a Tesla engineer for updates on its electric truck program, selling microchips abroad, and creating new startups using stolen trade secrets. Her complaint also describes Levandowski reacting to the arrival of the Waymo lawsuit against Uber, strategizing with then-Uber CEO Travis Kalanick, and discussing fleeing to Canada to escape prosecution.

Levandowski’s outside dealings while employed at Google and Uber have been central themes in Waymo’s trade secrets case. Waymo says that Levandowski took 14,000 technical files related to laser-ranging lidar and other self-driving technologies with him when he left Google to work at Uber. He is not a party to the original Waymo complaint against Uber, however, and no criminal charges have yet been filed against him. Levandowski has consistently exercised his Fifth Amendment rights and not responded to allegations in that suit.

A statement on the Wong lawsuit from Levandowski’s spokesperson is unequivocal: “On January 5, a frivolous lawsuit was filed against Anthony Levandowski in US District Court. The allegations in the lawsuit are a work of fiction. Levandowski is confident that the lawsuit will be dismissed by the courts.” Little is known about Wong, who did not immediately respond to a request for an interview. She says in the complaint that a medical background earned her a higher-than-average salary for a nanny; that she had taken law classes; and that she had produced a short film on Sebastian Thrun, who led the early development of Google’s self-driving car.

In the complaint, Wong describes a scene from February 23 of last year, the day Waymo filed its lawsuit against Uber. When Wong arrived for work that evening, she says she saw Levandowski walking in circles in the living room, sweating profusely and talking to his lawyer, Miles Ehrlich, on the phone.

According to court records, Wong recalls Levandowski screaming, “Fuck! Fuck! Fuck! How could they do this to me? Miles, what about the clause, you ... said this would work! What do I do with the discs? What do the contracts say? It’s all mine, the money, the deals, it’s all mine. What about ‘the shit?’ These are all my fucking deals!”

On March 11, a day after Waymo filed a motion for an injunction against Uber, Wong describes Levandowski texting her to say he was bringing his boss home with him. Half an hour later, she says, Kalanick and Levandowski arrived, bringing with them a white bucket containing circuit boards and lenses, as well as legal documents for Levandowski to sign. She writes that Kalanick spent about five hours at Levandowski’s home.