half sister

it all started when my half sister started going to skool with me, she was 13 and so was I, we were like best friends at the time, until 1 day my mother& father were goin out for dinner and a movie. so by the time they were gone me and sara (sara is my halfsister, oh and i am chris) were cuddled up together watchin a movie, when i asked her if she had a boifriend, by now i had a buldge in my pants, because of wat i was thinking that moment ( naughty things ) " no i dont, why do u ask?" she said. well i d