And, perhaps (again just my thoughts), the person "required" her to hold the door open because they were carrying something with both hands.
Maybe, just maybe, she had asked for something from the store that "couldn't wait 'til morning", or that she was persuaded could be brought to her right away?
I don't know. I'm using my old person logic here. This feels more and more like trust violated, a seemingly innocent situation taken advantage of..."why open the garage door again? I'll bring it to the door."