"Well what???"Again, her eyes met mine. "Well, it was kind of hot."There it was. She'd gone and said it. Without any help from me, my cock began to ha...den in earnest who, frankly, wasn't very happy about it. But seriously, my erection was hard to miss. There it was, tenting my sweats, my sister literally just mere inches from it and her the object of my fevered imaginings. I could feel beads of sweat forming on my forehead."Hot, you say? Well... I'm feeling rather warm myself!"Oh my god what a. Her face was turning red and her cheeks were swelling up. Her tongue stuck out and wagged obscenely as she tried to taste fresh air. It was no use though. Slowly her skin turned blue. She began to dig at the rope with her fingers, slicing her own skin with her nails.When her kicking slowed to a stop, the men beneath her touched her feet to see if she would respond. It looked like harmless tickling. Her feet moved involuntarily but that was all. They pulled her skirt down, exposing her lace. She seemed to notice me staring, but didn’t seem to be uncomfortable with it. With her big brown eyes she looked up at me, “daddy, I know I shouldn’t ask this but I love you so much and trust you, could you maybe help me and show me how it really should feel? Shocked with such a request I knew how wrong it was. My brain told me no, but my male hardwiring couldn’t resist. “honey you know I cant do that, its so wrong”. “oh come on dad!”. At this point I couldn’t resist. A young ripe girl, ready. But it’s just that I feel so...well, you know...” I indicated with one hand to the ropes above my knees while my other hand shielded my exposed core.“Vulnerable? Helpless? Ashamed?” “A bit,” I conceded. “Good,” she purred.I was starting to feel panicky with confusion. While my body was melting with anticipation, my conscience was valiantly fighting against surrendering. Social conditioning dictated that, although it may be acceptable to have a female lover if I kept it discreet, I would be.