Little sister

Gretha-:" Hi big sister ".

Me-:" Oh hi Gretha, how's my little girl doing? "

Gretha-:"I'm fine, are you busy right now? "

Me-:" No I'm free right now, do you need something? "

Gretha-:"I'm getting bored and I can't find big brother, so will you play with me? "

Me-:" Yeah sure, what do you wanna play? "

Gretha-:"You already know my favorite game ".

Me-:" Oh Gretha, you naughty little girl. Ok let's go to the toilet and have fun there ".

I took Gretha's hand and we went to the school toilet .

Gretha-:" Quick big sister, I can't wait ".

She pulled down my pants and started licking my dick .

Me-:" Haha calm down little angel. I'm not running away " .

Then I pin up her to the wall and pushed my dick forcefully .

Me-:" You like my dick? You naughty little slut".

Gretha-:" Yes big sister, I like your dick. Please push it all in".

We were just started enjoying ourselves but then we heard someone walking inside .