Personally, I'm tired of the insinuation that a male and female meeting alone must be sexual.
Could they be dating? Sure. But when I was unmarried and working, I was often the victim of office gossip every time an attractive male client wanted to have a dinner meeting (which was a normal course of business in my industry). It taught me not to paint others with the same sexist brush. No matter what Peter is doing with his personal time, I don't think Ms. Wallace's name and marital status were newsworthy.
Also, it is safer to drive than fly, if you can, during covid. It's also safer to stay at a private home than at a busy hotel during covid. I have a feeling these were likely the reasons the police found everything to be above board, as long as Peter had a business meeting in the area.