There is probably no one, other than Donald Trump, more central to his New York trial — the first criminal trial of an American president — than Stormy Daniels. Trump is charged with falsifying business records to cover up a $130,000 payment to Daniels during his 2016 campaign, when she was planning to go public with a lurid story about a sexual encounter with Trump a decade prior.

Today, in a courtroom in Lower Manhattan, Daniels took the stand for several hours. She testified in excruciating detail about the encounter, which she said left her shaking and bewildered. She spoke quickly, unspooling so many salacious details that the judge overseeing the case balked at some of the testimony, implying that it was gratuitously vulgar, and the defense unsuccessfully sought a mistrial. Here’s what we learned.

Daniels has told her story widely, but never to jurors, and not with Trump in the room. Her appearance on the stand appeared to unnerve Trump, who at one point shook his head in disgust and muttered an expletive to his lawyers.

During cross-examination, which is expected to continue on Thursday, Trump’s lawyers sought to paint Daniels as a liar driven by greed. Trump has always publicly denied having sex with her.