My little sister - short, cute, big tits - and waist-long red hair - was my only real companion growing up. We'd found our parents stash of porn many years earlier, and she had been using the large dildos that she'd found hidden away in their bedroom, long ago. After high school, we both lived with our parents for a few years, helping to run my dad's business. Our parents left for work early, and came home late, and, on the weekends, they bowled in a league, and drank until the bars closed.

One evening, we were alone, as usual, and I walked in on her using a dildo, completely naked in bed. She didn't freak out, and she didn't stop.  After watching her for a few minutes, she let me use the dildo on her pussy.  I loved how huge it was, stretching the skin of her pussy hole around it. I was easily putting nine inches into her every time, plunging it into her cunt-hole. Before long, I was trying to suck her nipples, but they were like bee-stings - hardly any nipple protruding at all, even though her breasts were a solid B-cup.

That didn't last long, before she started fumbling at my jeans, wanting my cock. I was rock hard anyhow, and when she got on her hands and knees, doggy-style on her bed, I plunged my cock right into her waiting pussy. We fucked doggy-style for awhile, then face to face, missionary, and finally cow-girl, with her on top. I warned her that I was going to cum if she didn't stop, and she only fucked my cock harder, taking my cum-load in her cunt, balls-deep. 

That was only the first time. The next day, we were home alone, again, and she pulled me into the bathroom. She sat on the top of the vanity, legs spread, and we fucked like that until cum was running out of her pussy. 

We kept looking for opportunities after that, to be alone together, and I never fucked her once that I didn't creampie inside her pussy, filling her loins with my hot cum. We were very lucky that she didn't get pregnant. She still doesn't have kids, and doesn't want them. She's always been truly happy to have the freedom to do what she wants without a family dragging her down.