The sudden eruption of his seed woke him up. With a look of dismay he watched his fluid drip from his belly onto the furs. Looking around, he tried to...find something to clean up this mess. His fair skin blushed furiously at the thought of her coming in right then. That thought spurred him on to get up and for the first time in more than a week he stood on his legs again. The thought of her coming in before he had had a chance to clean up, made him so nervous he never realized he was naked. He. She knew what her friend was planning and her desire spiked. She had been stretched by fingers and toys before, but never by an entire hand. Kathy inserted her four fingers as before and slowly worked them in and out and twister her hand around in the process to loosen Sarah up as much as possible so as to not hurt her. When she felt Sarah was as ready as she was going to get she folded her thumb down into her palm and started to slowly push her hand forward. Sarah was biting her lip waiting. She knew exactly the pace she had to go as she finally started taking my head into her mouth pushing further down. A bit of a gag until she had adjusted her skillful mouth and my cock started vanishing down her throat. Deeper and faster she went, her beautiful big eyes longingly looking up at her boss, her mentor, her teacher while she gave everything to please. Her movements were getting faster and her eyes were looking at me to say “fuck my mouth, please push harder, I’m all yours”. At this. After few seconds she told me to come in. Now she was standing on the top and oh she was wearing a skirt which I couldn’t notice earlier because I was awestruck looking at those boobs. She gave a naughty smile and asked me to sit. She came and sat near me. I gave a short smile. I was embarassed as to what had happened cause she was my sister and I saw her half nude but I was horny as fuck on the other hand. I had a bulge in my shorts which was clearly visible. She held my hand and told me to.