A.N: This is just a piece of fun not serious at all.
Twilight
Bella Swan arrive in Forks to live with her father. She meets Edward Cullen who is a nice vampire and they fell in love. Bad vampire James tries to have Bella for a snack but is killed by the other nice Cullens. Bella and Edward go to prom.
New Moon
Jasper tries to eat his brother's girlfriend at her birthday party. Edward leaves Bella. Bella gets depressed. Bella start hanging out with her best friend Jacob and getting better. A former member of James' coven Laurent tries to eat Bella but is stopped by the werewolves. Bella finds out that Jacob is a werewolf. She jumps off a cliff for fun. Alice Cullen comes back. Edward gets suicidal thinking his human beloved is dead. Bella saves Edward from the bad Volturi vampires. She is voted to be soon a vampire by the Cullens. Edward asks her to marry him.
Eclipse
Bella is torn between a werewolf and a vampire. She wants to have sex with Edward. Victoria (former mate of James) raises an army of newborn vampires against Bella and the Cullens. The Cullens and the werewolves come together to fight them. Edward kills Victoria and werewolf Seth kills the new lover of Victoria, Riley.
Breaking Dawn
Edward and Bella marry. They have sex and Bella gets pregnant. She gives birth to a half human, half vampire girl Renésmée. Jacob falls in love with Renesmée. The Cullens, werewolves and other vampires protect Renésmée from the bad Volturi. Everyone lives happily ever after.