Where it happened: our house
we were both 13 and our parents thought we could be left alone for the first time.what we didnt realise was that our parents would be gone until tomorrow. we were supposed to be asleep at10 but my stepsister had other plans. she had just gotten out of the shower and stood in front of me in only her panties and her tightest bra. her boobs were just moving into a b cup but were still hot and sexy. i didnt have any choice but to gape. at the age of 13 her body was perfect. she then started kissing me while giving me a lapdance and my erection got bigger than ever. she then unzipped my pants and gave me a blowjob. i came after about 30 seconds but i was still extremely hard. then we both took off our clothes. she went down on my erection slowly but stopped because she was a virgin. i then popped her cherry and she said it didnt hurt to bad. we then started having hard sex. i came i dont know how many times yet she had been planning this and had been taking birth control pills. we did it for hours and i fell asleep with my dick in her and woke up with it in her. we cleaned up and got dressed and she gave me blowjobs and handjobs for 2 hours.then we just kissed until our parents got home. we still have sex when we see each other sometimes.