magfreak:

AU in which Gwenโ€™s childhood sweetheart is Tom, who parts with her amicably and stays in touch after she comes out to him as gay just before university, where she meets Sybil who is bisexual and becomes her girlfriend in a relationship full of drama because it is full of firsts for them both. A few years after uni they reconnect and become good friends again (and only friends). Gwen meets the love of her life, gets engaged and on whim sits her two exes together at her wedding โ€ฆย