The wife found a video of a company dinner from six months ago in her drawer. (Shiramine Miu ADN-630)

I found an unfamiliar USB drive in my wife's drawer. What could it contain? Curious, I played it and discovered it was a video recording of a company dinner from six months ago. I had left halfway through, so I don't know what happened afterward... In the video, my wife and Department Head Nakata were having a secret meeting at the restaurant...