My fantasy is being cuckolded by my mom and brother, and to have them breed bastards as I watch on as a pathetic loser.  I wrote a story at the following forum: https://www.spacefucker.com/threads/intense-mom-son-cuckolding-fantasy-story-a-bit-extreme-involving-impregnation-etc.369016/

Warning: A bit intense with the language so you've been forewarned. I would love comments especially if anyone enjoyed it.