There is no evidence, only 2 accounts of what happened that night, maybe his account is true, maybe hers is true, maybe both are invention, we will never know. Her lawyers have told her she has no chance of a winning a case against him and could be sued for defamination if she tries, so they have dreamt up some kind of unfair treatment case against the employer.
The employer is in a no win position, they have to respond to the case so it is going to cost a great deal in legal costs, they are likely to loose a court hearing with a jury because a jury always favors the poor defendant against the big bad company. So they will settle out of court with a NDA, that's the way it is, a big payday for her and the lawyers, nothing whatsoever to do with " me too ".