I saw my brother kissing Santa Claus- a Kingsman festive Fantiction

For Christmas Eve, Eggsy wanted to surprise his baby sister with a visit from the "Real" Santa Claus, and he asked his boss and colleague (and current boyfriend) for a big favor. Things take an unpredictable turn and Eggsy Unwin might end up introducing his older, posh secret agent of a boyfriend to all his family on Christmas.