Fucking with Nature (Literally)

What happens when a group of young girls become Harem wives to an evil creature known as the Slenderman? You'll see ;)

This story is for 18+ do not read if you are under 18, this book contains Sex, lots of sex, bondage, you know; 50 shades of grey but if Grey wasnt human and some evil Spectoral creature with the thirst for human wives. No seriously 18 or GTFO