My little sister became addicted to me eating her pussy nearly every day when we got home from school.  

Believe me, I wasn't complaining!  Our parents had a national library of porn and sex toys, so together, we started watching porn movies, and reading Hustler.  It was quite entertaining for a 9yo girl and a 12yo boy.  Of course, we watched straight-sex, tons of that, group sex, then lesbian sex, femdom, pegging, tit torture, you name it, they had a grab-bag of good porn!

So our daily ritual was to get home, grab some snacks, hit the porn and magazines for a while, then my sister would want me to lick her pussy and tongue her asshole for hours!  She started using some small dildos on her ass and cunt, and one day, we were in her bedroom, playing on her bed, and I went into our parents room and found a really big creamy-colored dildo.  It was huge!!  I was just going to tease her with it, and she was like, "Bring it over here!"  She got on all fours, raised her ass way up high and said, "here, work it into my pussy!"  "Ain't no way that's going to fit in there!" I said.  "But if you want it,"  "Yes, PLEASE, fuck me with it!" she commanded of me.  I worked that thing hard on her, and we lubed it until it was dripping with lube, and finally it went in.  "YESSSSS!!!!" she moaned as her vagina was being turned inside out by the monster.  "Ohhhhh, fuck me with it!  Fuck me HARD!!"  Eventually, the monster dildo was cracking her open like a safe, and I got a great rhythm going, and the slopping and slurping sounds were fantastic, as the big dildo was sucked back into her open cunt with every thrust.

I don't know if she cummed, but finally she wore out.  Her cunt was gaped open so big, after I pulled the dildo free, that I could stick my fist into her open cunt with little effort.  I LOVED her cunt.  Every inch of it!