Isla Sandoval has lived with one burning desire since the brutal massacre of her family. Determined to make the Havoc family pay, she has trained herself for years to infiltrate their world. Fake name, fake identity, fake person. As she gets closer to her goal, Isla finds herself trapped in a dangerous web of manipulation and power fighting not only to destroy the Havocs but to keep her own sanity intact in the face of Cain Miguel Havoc's dangerous desires.

ruining your childhood one cartoon at a time. ⋆i take credit for none of the theories in this story and credit is given at the end of each one⋆

EDIT: This book has been discontinued. You're fully allowed to look at the only published lemon on there but my new lemons and such will be published on a multi-fandom book so I'm not limited to just Undertale. Sorry for the inconvenience. ;v; Forgive me for I am sinning. I have no regrets though. XD Book will mainly include: • Undertale • Underswap • Underfell • Inktale? Maybe Gaster!Sans too. Idk. I will NOT do: • Any Floweys (Gross yo he's a flOWER) • Freshtale (He creeps me out, sorry yo) • Cattale • Errortale (Error!Sans wouldn't fuck anyone if he's only there to destroy shit lmao) • Any of the Dogs or other Monsters (Aka Monster Kid, Temmie, Doggo, Lesser/Greater Dog...)