"Oh fuck! I'm going to cum soon!" i groaned."Yeah?" asked Katie."Yeah!" i groaned back."You want to cum in my pussy? You want to cum in my sweet littl... sister pussy/" she then asked."Yes! Yes!" i groaned."Then you're going to do me a favour when i want it?" she asked."Anything! Anything!" i replied still thrusting rapidly into her."You promise?" she asked."Yes! Yes!" i replied.I knew my sister was now manipulating me, and whatever she really wanted wasn't going be something i was going to. I myself don’t sleep much in train, I just took out my laptop and while talking to her I told her that I don’t sleep in train and I’ll watch a movie, she said ok and will join me for the same.She came on my birth and we just started going through the movie folder and I started a movie which she had chosen and the movie was original sin, as you must know it’s full of intimate scenes, I asked her if she’s comfortable with it, she said yeah and we started watching it.We both were feeling little. She was wet, dripping, sopping wet. He lifted his fingers to his nose and then sucked them leering at her with his desperate eyes. “I have been rubbing his cock all they way here. He told me he is going to fuck me silly. I told him, as long as his friends join in too. I have cum so many times on the bike already.” “What did he say?”, Max’s heart was in his throat, as he thrust two fingers back into her. She was cumming already. She moaned in his ear and held on to him as the orgasms racked her. I was tossed in the back of the sumo car. Everyone hopped in, and the car drove along the road. They tore apart the tank top I was wearing and used the fragments to tie up my arms.The same fate was bestowed upon my jeans, which were used to tie up my legs. A pocket knife was used to cut off my bra and panties, and they were thrown out of the car. I now lay on my back upon the floor of the car. My legs rested on the seats on either side and tied to the corners.I laid on the floor, completely.