Cousin sucks my dick and likes it

This is another true story, just like the one my sister wrote about our first time together.

I was a 14 year old boy, and always constantly horny. My cousin was also 14, but she had autism that made her have the same intellectual capacity as a 7 year old child. I quickly saw how i could use this to my advantage.
One day, I was babysitting her while her mother went out and i told her we're gonna play a game called "guess the food." I told her that she would be blindfolded, I'd put a little bit of something on my finger, and she'd have to lick or suck it off and guess. She said "ooh, sounds fun!" So we went out into the backyard, i blindfolded her, then put some peanut butter on the tip of my cock. "Open your mouth." I put my dick in her mouth and she sucked the peanut butter off. She guessed correctly. Then i did the same with strawberry jam. This time though, I put it along my entire length. She sucked my dick again. I did it a few more times with honey, chocolate syrup, whipped cream, and ketchup, her thinking it was my finger the whole time. Her mouth was incredibly wet and soft. Finally i felt I was about to cum and told her "for this last one, I'm gonna pour it in your mouth, but dont swallow until i tell you to." I started jerking my dick furiously and came all over her tongue and then snapped a pic of her cummy tongue with my phone. Then I said "now swallow." She did, and then said "hmmm... were those egg whites?" I was gonna tell her it was plain yogurt if she didn't have a guess, but I said "bingo you got them all, Ellie!" I pulled my pants up as she took off the blindfold and said "that was a lot of fun! Can we play it again?" "Some other time, Ell." When her mother came to pick her up later, she told her mom about how much fun she had playing with me, and her mother later said "i hope you can watch her again soon." My dick got hard at that; it was like she was giving me permission to continue abusing her little girl.
A week later, I was asked if I could watch her again, and if she could spend the night so that her mom could go visit her sister one state over. Of course I happily agreed right away. What happened next is really nothing you couldn't figure out yourself. Same game, a couple more foods, and another cum in her mouth, where this time i DID tell her it was yogurt. Over the course of the next few years, I played this game with her multiple times, each time she and her mom were none the wiser. Of course, Astrid knew about this the whole time. Recently though, we've been thinking about paying a visit to our hometown and spending the night with Ellie. Her brain has not developed much further, and Astrid wants to see if we can get Ellie to fuck. Is Incest Baby #3 gonna be mothered by our cousin instead of my sister? Guess we'll find out in a few weeks!