I just read Scarlet Horizons, i never imagine Carole be featured that horrible before; but I find out it’s interesting to read. Could you introduce some fics like that? Mean Carole
This is the only fic that I’ve read that has a mean!Carole. She is normally portrayed as a loving stepmother who gives great hugs. I did manage to find a fic, but it was abandoned long ago. I also included on the list fics where Kurt has a mean stepmother (but not Carole). - HKVoyage
When Blood Isn't Always Thick by aalikane (ABANDONED- last updated in 2012)
After Burt & Carole get married, Kurt believes his life is going to go perfect. He has a father, a step-brother, & a step-mother. What else could he ask for? Things change, when Carole starts treating him like the hired help, instead of her step-son.
Scarlet Horizons by cindyloowho0105
When Kurt was attacked by rogue vampire Karofsky, he withdrew from everyone but his father. Desperate to help his son and out of ideas, Burt agrees to send Kurt to Dalton Academy, a school full of vampires, hoping against hope that by facing his fears Kurt will be abe to move on. Kurt just hopes he can survive the first day and resist the charms of a vampire named Blaine.
Love's Arrangement by writtenfables [PDF and EPUB]
Before he passed away, Kurt’s father arranges a deal with Blaine Anderson, the son of the late Brock Anderson of Anderson Banks and Stocks – a marriage between him and his son, Kurt when he is of age. Kurt goes into a world that is so unfamiliar but more welcoming than with his step-mother and siblings, as Blaine’s husband.
Fly Away by dancewithme19
A Cinderella AU mash-up extravaganza, complete with a wicked step-family, a charming prince, and an eccentric fairy godmother. Blaine's dearest wish, besides escaping his life of forced servitude, is to find true love. But wishes don't come for free, and Blaine might just discover that the force of his will is stronger than any magic. Told through five different adaptations: Disney’s Cinderella, Ever After, Once Upon a Time, Into the Woods, and Ella Enchanted.