It seems to me that I open the door far too many times just as she is turning into the driveway for it to be coincidental. I "feel" like she is near.
Ah, this is a perfect case. There are lots of reasons....it's very possible you are checking more often than you are consciously aware of, it's possible often know about what time she should be home and you have a heightened awareness around that time. It's possible you are picking up on cues that she is turning into the driveway and you just aren't aware of it.
It possible to check for all of these, for instance, start documenting how often you open the door or look out the window. The problem comes in because the act of trying to measure these things changes your behavior and it can't be proven your behavior is the same. The act of observation changes the thing being observed.