The Boy Who Cried Werewolf

Four years after Weirdmageddon, Dipper, Mabel, Stan, and Ford return to Gravity Falls for the summer. Dipper and Wendy reconnect on a deeply personal and intimate level. Dipper and Mabel fret about their parents' upcoming divorce. Plans for the future are made: Dipper has finished high school early, and has won a scholarship to Miskatonic University, on the strength of his academic work, his granduncle Ford, and one of Ford's old colleagues and teachers at Miskatonic, Prof. Rick Sanchez. Mabel is still in high school, but has been doing advanced reading in psychology.
Wendy and Dipper want to plan a future together. Mabel wants to move to Gravity Falls when she finishes university to open a craft store and counseling center. The Stans are thinking of continuing to travel the world investigating paranormal phenomena and producing a show about it all along the lines of Mutual of Omaha's Wild Kingdom. However, an ancient evil threatens Wendy and Dipper, and all of the Pines clan's hopes for the future.
I have no idea how long this will take to write.
This is my first attempt at fanfiction. I recently discovered the Gravity Falls show, and so, of course I am late to the party-- late by several years. However, I wanted to try my hand at this. I have self-published several books, but I have never attempted fanfiction, and more specifically, I have never attempted romantic, sensual, or erotic fiction.
Please feel free to critique my writing-- and be as brutal as you can. My aim is to improve.
FURTHERMORE, DISCLAIMER: All characters engaging in sexual activity are entirely of legal age, no matter what anyone else says, cos, y'know, those are the rules.

Working title was "Just Tell Me Where to Go"