So, as a little girl, my friends' mother used to talk about this nice old lady who used to sit on her bed and stroke her hair as she fell asleep. Now, the parents thought she was just imagining it, and other relatives called 'ghost' — but on the whole they just put it down to the overactive imagination of a little kid.
THEN — one day, their housekeeper sees a woman coming out of the little girls' bedroom. So she runs after her and grabs this real-life woman, who is in her 80's and very confused.
Turns OUT that this woman used to live in the house and moved nearby, but since they didn't change the locks when they moved in, she kept letting herself into the house at night and gently petting my friends' mum as she fell asleep!