Pa..I..N..” my sister whimpered in pain. But I didn’t listen to her, I pulled my dick out and gave another hard push in her eager twat.“Aaaahhh.... you son of a bitch.. Slow..Ooooh”, she said. It was the first time I was hearing my sister using vulgar language. But it gave a kick to me. I held my sister’s waist tightly and pushed my tool still hard and started fucking her in doggy style.After a while, I totally bent on her back, holding her milk pots and playing with them. I started moving my rod. I did this without hesitation and when I hiked it up past her waist, I gently rubbed her freshly shaven pussy lips right through her panties. She didn’t discourage this, so I rubbed her pussy until she felt like moving on to the next step of my fantasy.After that little session, my sister let me live out my next fantasy, which was to massage her while she pleasured me. I rubbed lotion all over her body and she made me take my shorts off. I so wanted to insert my cock into her lubed vagina but. Ian cherried up slightly and did not want to make the decision. "Where do you want me to cum?" he asked. During this short conversation I had been wanking his cock slowly and I returned to it sucking his pre cum off his bell end. It tasted good and I wanted to taste my friends cum but was very nervous about it. Should I say cum on face then I could control how much cum I tasted or just take a load in my mouth? Still sucking his cock I pointed to my mouth. Ian groaned "That is so fucking horny,. No pheromones, no neural inhibitors, nothing, nothing at all."I nodded, dimly understanding what she was saying. She tilted her head up, offering for me to kiss her. I caressed her cheek, we kissed briefly, much more in compassion for each other than passion. She was beautiful though, and sexy. I felt myself beginning to get aroused, anticipating what was coming. An odd puzzle occurred in my mind. I whispered, "Pheromones? That doesn't sound supernatural. That sounds... physical."A'moth laughed.