Go and open it.Me: no sister I can’tShe got angry and shouted meSister: you useless bitch you’re disobeying me and she slapped me and said how dar... you??? I am going to call momMe: no sister please I beg you I am sorry. Please don’t call mom.. I am going.. I will open the door please.Sister: (in angry tone) go nowI went and open the door hiding behind the door, and one well build guy came in. I got more terrified now. I thought he is a delivery guy. My sister seeing this and started to lough. She then pulled down her panties and told me to fuck her. I complied, but hesitated for a second. I eventually just sat on my knees in my shower and without even a seductive look or a ok go ahead from my sister I rammed my dick into her pussy, and at first she was different i could tell from all the other girls i had slept with, she was a little loose on the account she had had a kid which was currently asleep in the other room. I decided that I couldnt fuck her it was just too weird, i was. I rocked my hips back and forth, gyrating on his cock buried deep inside me. He pulled down my dress to expose my nipples and sucked on them as I rode him. My clit was rubbing up against him hard, giving me exactly what I had needed in the first place and my orgasm began to shake through me, as his cock felt my body erupt around it. I moaned in his ear, still gyrating. My whole body seemed to release over him, leaving me breathless.I moved to get off of him, joking that I had got what I wanted. Her friend licked her nipple while she cupped my sisters big c cup tits. their tongues spared out of their mouths as i began to stroke my cock. my sister shimmed out of her pajama bottoms to reveal white cotton panties. she looked at her friend and bit her bottom lip, she brushed her panties to the side to reveal her shaved pussy. her french manicured finger slide between her lips to spread the folds of her cunt for her friend (and horny brother) to admire. Her friend's hand slid from her.