... whisper out of the window, 'I can see you!' in the creepiest voice I can manage?
In serious, heard the side gate swing a couple of minutes ago so had a glance out of the window. Fairly certain it's the neighbour from a few doors down but it doesn't look like her husband.
DH (who isn't here) thinks I should ring the police non-emergency. I think it's harmless (unless it is an affair but I'm not 100% it is her - there's been an event on at the pub at the end of our road but she'd have had to walk past her house to get to mine) but I don't think they mean any harm to us.
What would you do?