Unfaithful (2002)

Plot hole: When Edward meets with his PI, he hands him pictures of Connie and Paul that were taken the day before. In these pictures, there are also pictures of her coming out of Paul's apartment wearing jeans and a raincoat. The day Edward "went" to Chicago, was the same day she and Paul went to the movies. The next day, when Edward met with his PI to get the info, she hadn't seen Paul yet. And the day Edward hired the PI to follow his wife, she had already come and gone from Paul's wearing another black dress. The PI would only have time to see them on the day of the movie trip.