i'm not familliar with the quest itself, never done it myself. But as far as I could tell, it only just talked with the boy and had to get into the house for the first time, for that it had to search for the key. At that point it got stuck and i had to stop the script, it tried to get the key from underneath the flower pot, even though it wasn't there. (Pretty weird, since it should be there). So now either, there is a second spot for the key to appear at or the script has grabbed the key and lost/dropped it. So now i'm stuck and can't even finish the quest myself because the key isn't there anymore
As far as I know it hasn't been to any part of solving any puzzle