It was just before my six-year-old step-daughter Kelly's bedtime about a week after I first cummed in her little panties (while she wore them). As usual she was sitting on my lap: my rigid dick snuggly nestled between the front panel of her little panties and her miniature pre-pubescent mound, as I read the messages my friend and I have sent back and forth aloud to her.

The message I was reading he'd sent me a few months earlier, "...I decided it would be fun to give my daughter and both nieces panties wet with my seed to wear to school yesterday. So, I got up extra early this morning, retrieved clean pairs of each girl's panties and tied the crotches..."

A sudden and unexpected (not to mention very close) clap of thunder had startled the hell out of both Kelly and myself: each of us nearly jumping out of our skin, so to speak. Our respective movements had caused my dick to reposition itself in my stepdaughter's little panties...it was now wedged in her little butt-crack against the back panel of her panties.

"Daddy, your thing's in the wrong spot..." Kelly said in such an innocent voice my dick twitched and my ass-cheeks were just barely beginning to tighten.

I was a mere fraction of a second away from my orgasm. The little head in my pants was once again doing the thinking for my entire body. "We could try shooting it in the back this time..." I found myself suggesting.

"...Okay..." Kelly replied pensively.

That was all the "go ahead" I needed. My butt cheeks rapidly tightened the rest of the way. I tried to keep reading, "...together..." my hairy balls drew up under my dick, "...with a..." the cum began surging up the little tube on the underside of my shaft. As I read the word "...piece..." my dick erupted: spewing the first spurt of my hot, thick, sticky, creamy-white, sperm-laden, adult cum right up the back of Kelly's little pastel yellow "SpongeBob" panties. The instant she felt the warmth and wetness of my seed on her soft pre-pubescent skin she jerked her six-year-old body up slightly; causing the second spurt of my cum to spew directly against her little ass-hole. Her weight shifted slightly, causing the tip of my dick to burrow in slightly, pressing up against her closed sphincter. With the eruption of my third spurt of cum my hips involuntarily jerked up slightly: forcing the head of my dick to spread Kelly's six-year-old little sphincter open. An instant later, the head of my dick popped through Kelly's sphincter. The fourth spurt of my hot, thick, sticky, creamy-white, sperm-laden, adult cum erupted into her pre-pubescent rectum: HOLY SHIT did that feel GOOD! A fifth, a sixth, and a seventh spurt followed: shooting directly into my six-year-old step-daughter's little rectum.

"That hurt...I don't wanna do it again." she complained, a small tear in her eye.

"Sure honey, tomorrow night we'll do like we normally do... Now it's time for you to go to bed ..."

"Okay, good-night daddy..." Kelly said as she began to climb off my lap. I couldn't help noticing the audible "popping" sound as she pulled her tiny sphincter up and off the swollen head of my adult dick...and the sight of a drop of my seed oozing out of her slightly stretched out ass-hole, dripping down into the back of her little pastel yellow "SpongeBob" panties as she pulled them up.