She feels something swim past her underwater.

(chapter originally by halofan6743 at writing.com)

Any haunted house enthusiast like Mackenzie would know that can't use real blood for anything its too unsanitary, but they can mix up a cocktail that would feel just as gross to anyone with the misfortune to touch it let alone swim in it buck naked like she now has. Part of her almost wishes she was naked in front of a crowd of people rather than feel this gross, but that part of her is merely a vocal minority she knows this special effects muck is harmless and whoever those footsteps belong to won't be able to tell she's naked in here which means maybe she can get some help.

Unfortunately just as things look like they'll get better they get worse and she feels something move under the surface of the water very close to her. Her arms shoot to protect her breasts and pussy from contact or... intrusion, but that leaves her covered feet unable to support her alone in treading water so the voluptuous beauty quickly kicks her shoes off (her last though ineffective garment) and without their weight begins to kick more rapidly to stay afloat.

She starts to breathe more heavily both with physical exertion and rising fear and anxiety as to what could be in the pool with a **** and exposed female such as herself, and so she tries to start kicking her way towards the edge of the pool but before she can get very far something bursts from the water between her and the closest edge. Its...