The Golden Twin - A Game of Thrones Fanfiction

What if Joffrey had a twin sister called Joanna? Would he be as cruel as he is now? Read to find out. Spanish translation available in this account: @Liceth_2005 DISCLAIMER: I DO NOT OWN GAME OF THRONES OR ANY OF THE CHARACTES/PLOT MENTIONED IN THE SHOW AND/OR BOOKS. I ONLY OWN JOANNA AND HER STORY. WARNING: INCEST, SEXUAL MENTIONS BUT NOTHING TOO EXPLICIT, MURDER, DEATH AND GAME OF THRONES HARSH STUFF. ALSO, ENGLISH ISN'T MY FIRST LANGUAGE SO I APOLOGISE IN ADVANCE FOR ANY MISTAKES.