I've always fancied my step dad and fantasized about him sexually. I had one fantasy that kept coming up everytime I masturbated... that he filled me with his seed and got me pregnant! I wanted him so bad that I made up a story so I could ask for his help. I told him that I had met a new guy and he'd asked me out. I said that I wanted to... you know, be intimate with him but I was scared I wouldn't be able to handle him... you see there was a rumor that he had a really big cock. He sympathised as I told him I'd only been out with one boy before and he wasn't very big. I couldn't believe it when my step dad agreed to us having a secret and letting me practice with his! Here's what happened...