It was about 11 pm at night and my second daughter aged 10 months woke and started to cry. It was my 'turn' that night to go and settle her and put her back to asleep. My wife was in the third bedroom of the house with our first daughter as she had needed settling from earlier in the night.
I woke up and walked down the corridor towards her bedroom half asleep and I could hear my wife in the bedroom trying to calm our waking baby. I popped my head around the corner and saw her silhouette rocking her to sleep. I thought, 'cool my wife has popped in and I can go back to bed!'
So I went back to bed and after about a minute I could still hear our daughter stirring and then start to cry louder. At about the same time my wife came flying in to say what the hell I was doing and why I walked past the bedroom and not gone in and seen the baby. I exclaimed that I saw her in there. At this point she said, "Don't lie I have been in the other bedroom and heard you come down the corridor and then walk back again". She was never in the room.
So who was in the bedroom then? I only saw a quick outline and heard them making a 'shhhhhhhhh' noise as if to calm our daughter.
Thankfully nothing like this has occurred again.