>first day of summer holidays >twin sister barges in your

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>first day of summer holidays
>twin sister barges in your room waking you up at 11.30am
>"anon anon, lets do stuff together!"
>"ugh, but I'm tired"
>she jumps on your bed to wake you
>"lets go to the mall today!"
>pushes younger covers off
>jumping up on down on you on her knees on the bed
>she doesn't realise you have morning wood
>boner accidentally pokes out of panama pants
>slips along her upper thigh
>her boyshorts and panties are pushed to one side cause they're ruffled up from jumping
>all in the span of a second your boner slides all the way up into her vagina as she slides down on it
>both our faces suddenly turn to horrified shock
>"anon... did you just..."
>she placed her hand on my chest to try to push herself off me
>she makes a moaning sound as she slides upwards
>slips and comes back down again
>she leans forward her face inches away from mine and again tries to push herself off
>I involuntarily buck my thighs
>"nngh, what are you doing sis?"
>"anon... I.."
>she starts sliding up and down
>starts to go faster
>she's riding me in orgasmic throttle
>I can't hold it any longer and release my splooge everywhere inside her
>she collapses on the bed next to me and giggles, kissing me on the cheek
>"when do you want to go the mall, anon?"