I never thought about it as "creeping" but based on the definitions of this thread... I do it all the time. I sometimes will stand outside in the dark and "peek" at her through the windows. One of the great things about living where the next driveway is about a mile away and the nearest civilization (town) is 35 minutes away is how dark it is. The star gazing is great and I am not backlit when looking in a window. I just have to be outside of the light that comes from the windows.
I also will randomly walk into the bathroom for one reason or another sometimes to watch her pee. I like to watch her shower and dress also. One of the best things I have enjoyed the last year or so is that she misses shopping so she orders massive amounts of clothes online, has them shipped to the house, tries them one, and sends most of them back. I love watching her try on the outfits. It is like my own personal version of one of those clothing haul videos on YouTube except there is no censorship