Stolen from planeocracy
The "LUKE I AM YOUR FATHER" meme!
1. Comment with your characters.
2. Others will comment to them.
3. Now your character is somehow related to the one who started the thread/joined the thread (parent being an option, but bonus points for that)! Either they've known about this for quite a while, or one of them DRAMATICALLY REVEALS THIS LONG-KEPT SECRET or just says "Oh, hey, you're my long-lost bro/sis/dad/mom/kid/cousin/aunt/uncle/twice-removed cousin" right up front. This is up to you!
4. ???
5. Profit. Maybe.