Will You See Him?

“Sweetie there's nothing to worry about”
“The Monster, it’s here. You can’t see him but I can”
“Okay, lets check again.”
The Mother checked the closet. Nothing. She checks under the bed. Still nothing.
“See? Nothing here. Now lets get to bed.”
The mother kisses her daughter once on the forehead and leaves the room.
“You can't see him,” the girl mumbles, “but I can.”