"It's so big, I want to touch it"
From Create Your Own Story
Looking at her you throw her the thought "It's so big, I want to touch it". Sarath eyes drift from you and your dick and eventually submits to your influence.
"Billy can I touch it?"
Since that's what you wanted from the get go, you simply nod while grinning. Sarath's hands move down and grab hold of your prick. Using your own you help her get used with the movements as her hands go up and down your shaft.
With a grunt your body becomes stiff and begins to contract, you thrust your hips once, twice and thrice, spraying you dick juice all over Sarath's face. Your mouth forms a massive smile of satisfaction as you unload.
"Wow! It stinks and it's sticky!"
You apologize to your sister for covering her with your cum and tell her that for compensation you can make her feel just as good. She looks at you a bit scared, likely already guessing where this is heading. Obviously you try and convince her to have sex with you, however she doesn't seem convinced.
"Errr, I'm not really sure. I don't really want to lose my virginity to my little brother."
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