Suspence on the track

So, this is a story of a girl named Luna...... Luna was the only child of his parents..... she live nearby the river side....recently Luna started playing with some unknown kid at the river side......she told her mother Eloise that a stranger is her new mysterious friend.....Many times Eloise asked her husband Richard to move some other home near to town just for Luna, as she don't have any to play.... So she could find many friends in town..... Meanwhile,Luna got used to play alone and spend a lot of time at the river side... When the days were going on like this, one day Luna had come home happily and told her mother that she got a friend at river side. Eloise was surprised as per she knows, there were no one living near to their home...so there is no chance for anyone to come and play there.....then suddenly a mysterious thing happened that suprised Eloise and Richard (to know more look inside...)