.. we’re pretty much ... ah ... clothing optional, okay? Yeah, I do know ... listen ... pack me a bag with my brushes and hairdryer and ... yeah, yo... know what I need ... right!”She’d said, “we” again, referring to me and her—I liked that. It made me feel better about whatever this was.A thought occurred to me. I waved a hand to get her attention.“Hang on a minute, Steph,” Mercedes told the girl at the other end of the line.“Does she know how to get here?” I asked. Everything Mercedes had. I felt myself get an instant hard-on. I quickly became embarrassed at my own impure thoughts. She was my sister, it would be inappropriate, and disgusting to think of her that way. But I couldn't help myself; her firm behind and smooth porcelain skin was too much for me. I rushed to the freezer to grab the pizza and threw it into the oven, set the temperature and time, and ran to the bathroom door just in time to here the water start rushing from the shower head, and the soothing sound of her. We surfed around, and watched some reruns of Lost, which were confusing, but good. Throughout the cuddle session, Kristen kept getting closer and sliding her hand closer to my crotch. And believe me- it didn’t go unnoticed. I put one arm around her, and held her hand with my other. I couldn’t help but smile; everything was going to plan. I started to get hard as she slid her hand directly onto my inner thigh in one fluid motion, and she continued rubbing the sensitive area. With my hand, I. Oh my god, this had happened before. Mom had said it was arousal, and was meant for making it easier for a man's thing to go into a woman's place. This was bad.I must have twitched slightly, because Leila muttered something and pulled me tighter, making her hand pull in against my breast. I felt so ashamed when I sort of moaned and I felt my place tingle. It took forever to fall asleep, my body sort of going hot and cold as little flashes would run through my breast. Leila was up when I woke.