with the front windows open with the heat, Esther has taken to sitting at the front door once the windows are shut, presumably on the basis that if she went out the front, she should be allowed back in the front. As I do not want to encourage her to use the front door, and thus spend time on the street side of the door, it have been known to ignore her for hours (despite the pathetic mews that resonate up the stair well. I have cracked a few times, but that seems to only encourage her. So I grit my teeth and ignore her, and, since she knows where the cat flap is, she eventually comes round the back and in through the flap. It does take nerves of steel, I have to say.
But in the long run, encouraging her to assume the door will open if she sits there long enough will simply place her at risk, so I have girded up my loins to resist the temptation - it is called tough love.
If all else fails, I shut all intervening doors (to avoid sound from contradictory directions) and stand at the back door and call her. She will come running if she genuinely wants 'in'. I think this is one of those times when you need to bite your lips and resist her efforts to train you and just stick to a rigid routine...