I realised that it wasn't the first time Yvette's fingers had parted her best friend's pussy lips. I looked, questioningly, into her big green eyes an... she nodded. I was establishing a steady rhythm of strokes into Linda's cunt now. "Harder, fuck her harder!" urged Yvette.Linda, who had been letting out loud 'Ahs' and 'Aws' and 'Oofs' at each vigorous penetration, agreed, "Harder; fuck me harder!"I picked up the pace. Yvette stood beside me fingering herself with one hand and gripping my. “I want you to fuck me now, I have been waiting too long”, she pleaded. There was an urgency building inside me that I had never felt before. I had only one thing on my mind that consumed me for the time being. That was to fuck my s****r. I needed to fuck her. I need to make her mine. Nothing was going to stop me now from having my way with her. I had never felt like this before. My s****r noticed the change in me but she didn’t seem to be afraid or apprehensive. She reached for my cock and. "You dirty wanton little slut!" he hissed into her ear. "Did you really think I hadn't noticed the trashy way you are dressed today? You look like the filthy whore you are!" he said. As he spoke his hands roamed over her body. He started at her hips, sliding his hands slowly up her sides to her ribcage, then moving around in front of her to cup and squeeze her full, proud tits."Ohhhh," Rebecca moaned, closing her eyes and laying her face against the door."That's right, my little office slut,. "But," he said, "What do I get if I win in return?" "Shit man I can beat you with my eyes closed," I said, as Lisa and I both laughed at him.He just stood there, dart in hand thinking, before he finally spoke. "Tell you what ... If I win ... I get," and then he looked over at Lisa, "I get to fuck your girlfriend," he said with a sneer. "Fuck you man ...Mother fucker." I replied a bit pissed he would even throw it out on the table. "Ok then I get to diss her whenever I want then man and you.