I still doubt anything really happened. William is very aware of his place in history. I don’t think he would jeopardize his reputation. Maybe the woman made a pass at him and then blew up the story. I just don’t believe he would do anything to jeopardize his marriage.
Who know what happened with Rose Hanbury, but a few months after the affair rumors started, the Daily Mail had an article about Rose’s husband and his shady friend Francois-Marie Banier who lives in Paris. Rose may end up divorcing, but it may have to do with problems between her and her husband, and nothing to do with William. If William and Kate have distanced themselves from Rose and her husband, that may also be a result of not wanting to be tainted by the husband and his shady friend.