The Cat was keeping an eye on them
First and foremost, we’re not sure how this customer thought their UPS delivery was “hidden,” because the positioning of the carpet clearly indicates that there is something underneath it. Who are we to judge? In any case, this might have worked for them a few times.
However, their cat arrived at the window to see what they were doing when they decided to take a quick picture of the “hidden” package. In the end, the cat was the central point of the photograph.