Actually, some thing like that happened to me too. It was a week before I received the 'auntie sell chips' sms from my sister.
It was 7.20pm (Muslim prayer time) and I heard my doorbell. ASSUMING it was my hubby back from work, i opened the door without looking through the peephole. It was a normal looking tudung lady carrying a big bag. She smiled and suddenly started saying Sorry..sorry!!! I was like... Err...its ok...its ok... Then she quickly walked away. I closed the door and didn't think anything about it.
It was WEIRD...but if she is the lady everyone is rumouring about...she's not scary lehhh. In fact, she looks decently pleasant.