Finally, after six weeks, one day when I was pumping a thin trickle of milk appeared in the container. That night, you suckled eagerly, moaning when y...u got a few precious drops. You fucked me hard from behind, my heavy tits swinging, an occasional drop of milking leaking out.After that night, my production steadily increased. I loved the way my breasts looked, full with long, dark nipples. I wondered how big you would want them to grow, how much milk you would demand of me. You asked me not to. “Why, you look so good as you are” she replied and her hand moved lower.“Really Em, I should.....I mean I’m....”“I know.... getting a hard-on” She said, and with that her hand moved down my belly, and straight to my cock, her hand wrapping around it. I froze at the feeling of someone touching me like that for the first time. My sister’s hand gently rubbing my erection. She put her head on my chest and watched what she was doing.She started to build up pace, and soon my hips were bucking in time. The nipples were thick and rubber hard; slightly upturned and begging to be sucked.In spite of their size they didn’t sag!She turned and caught me looking. We both blushed and she started to cross her arms but then laughed and relaxed. “I’m so pleased we came here Dick,” she said. “It really does seem like paradise.”“Maybe there’s a snake nearby” I teased.“Well while it remains asleep in the sun it’s not a threat.” she smirked playfully.We swam to the shore and I was surprised when she simply. ‘Hey virgin!’ my friends shouted. I was a bit embarrassed but I couldn’t deny it... It was the sad truth. I actually never had sex up until then. I only ever kissed one girl… Without tongue.Since they knew me for years they knew I never had a relationship or even a proper date with a girl. So since they wanted me to finally have sex now I’m an adult I should do it with this inflatable thing. I laughed nervously and invited them in to meet my family. As you may have guessed walking in with a.