So my parents told me that she will be staying with us for 1 whole week and just listening that I was in 7th heaven and yes 1 more thing my parents bo...h are working. I was happy at this point too so days started passing my dad went to pauri as he is working in the pauri office and the day was Saturday there was a holiday in our school so me and my little sis was in home only and my Rena too and as I was attracted to her while my bath.I was masturbating fantasizing about her when I accidently. Then I started to lick her neck and began sucking to suck that part a little. I knew that this would definitely make her really horny and sure it was. She grabbed my head and pulled towards her and began kissing wildly. Those kisses turned to wild smooches. I reached her back and unhooked her bra from outside. This made her boobs came popping out form top. I stared caressing her boobs and started pressing those two melons lightly. We did not have sex before but we sure did do all this foreplay. We sat on my couch just talking and we both continued to drink.After about 30 minutes of just talking she got up to go get some snacks to munch on but the snack I got I didn't expect. My head was looking down into my drink as she walked right by my so she could lock my door and shut the blinds. I look up as she stands right in front of me and see she's pulled the skirt up and was rubbing her clit through her panties. I didn't hesitate to stand up next to her. As our bodies met I went straight. She rubbed it thoroughly, attempting to get the soap out; but the more she touched it, the more intense the feeling became. She began to feel her own juices leaving her body and she rubbed vigorously, which wasn’t helping. She removed her hand from her vagina; this wasn’t soap. She was getting horny, and it wasn’t even her doing. She frowned, gasping for air, attempting to let the feeling go away. Right now she wanted relief, so, double checking to make sure no one was around, she decided to.