The loli's perspective/She capitalized on her lead and it was all down hill from there
I tried to start going after her, but the second I reached for her pants I had to open up enough that she could manipulate my pants again, and she did not miss that opportunity. She grabbed my pants by the knees and yanked down, and it seems like when she was going after me before she had managed to get my zipper a lot farther down than I thought she did because my pants just fell straight down and bunched around my knees.
As soon as my pants had slipped down, Lilly slipped away. She used the moment I was distracted by my pants falling to get out of my grip, and the fact that I had my pants hindering me to out maneuver me. Suddenly, she was behind me and my naked ass was being shoved. "Push you!" Lilly cheered as she knocked me down onto my face. I quickly rolled over, and then she was pouncing right on top of me yet again, giggling like the little kid that she was as she goes to collect her victory. She came down with her entire weight on the hand that landed on my inner thigh, causing me to freeze for a moment as all my attention was now fixed on trying to not have my balls crushed by my clumsy little sister slipping and landing on my nuts. She just took full advantage of this, getting a knee on the pants that were bunched at my knees and pinning my legs to the bed with her body weight. "I win!" She declared with a giant toothy self-pleased childish grin as she closed her eyes and tauntingly tried to look cute at me, after which she reached over and wrapped her hand around my stiff little dick.
"Hey!" I protested. I did not like the fact that I had just lost so badly to my little sister, my mind was still struggling to catch up to how it had even happened, but I couldn't really come up with any comebacks to actually complain about so I just pouted a bit as she enjoyed her victory. We didn't actually have any official rule between us that we were supposed to sit and let the other touch our privates after they won by pinning us and getting a hand in there, but that was usually what we wound up doing for each other anyway. Actually, it's more that that's what I usually did. When I win, I'm stronger than Lilly, so I'm able to actually pin her so she can't fight back even if she wanted to. She has tried before without a lot of success, so it is more like she gives up some of the time once I start fingering her slit. In my case, sometimes I would like letting her touch my privates, so I just let her. Most of the time it was because I had been touching her a while and then I just flipped over and let her see my parts out of fairness, but on rare occasions like this where she actually did beat me I also felt like it was just right to let her enjoy her prize for a little while.