The Demon's HUMAN Mate (A Bill Denbrough Love Story)

What happens when Chertovka Hanscom, adopted older sister of Ben Hanscom who is also part DEMON finds her mate in a 14 year old HUMAN boy named Bill Denbrough who is over a 1000 years younger than her? Will love blossom between the two? Will Chertovka be able to save Bill from Pennywise who also happens to be HER BROTHER?!?