That's it really. I'm shaking with anger/shock right now. We moved in last week after spending a little while decorating. She has previously opened the front door and shouted hello up the stairs. I was a little surprised, but not too concerned since we weren't living there and were using loud tools upstairs so couldn't hear her knocking. She only stuck her head around the door that time and had come to collect her post. I'm guessing that she knocked the door again today but I didn't hear it. I was sitting in the living room when the door kind of moved in the frame. I didn't know why it happened, so got up to investigate and saw her walking off up the drive. I was so shocked that I didn't run out and ask what the hell she thought she was doing. I'm guessing that she actually opened the front door and came into the hall rather than just opening the porch door, since the living room door wouldn't have moved if only the porch had been opened. I have no idea why she thinks this is ok and don't really know what to do about it. I have no way of contacting her but know that she lives nearby. I'm worried that this may have happened before but I've only just noticed it. What on earth do I do in this sitaution? Is it enough to just start keeping the door locked (porch- we had a new lock fitted onto that dor and i don't trust that she no longer has a front door key after this) or would you do more? I'm so shocked and angry right now!