"She's never done that before." Really?" Really, she has played with him until he squirted, but never anything like this. That must be what a blow job...is."Brad kept trying to get more of his cock into his sister's mouth, but she kept her hand around it. She'd take it between her lips, leave it there for a few moments and then take it out and rub him. Kathy's brother would say something and she'd put it back into her mouth.My hand found its way back to my crotch and I was once again rubbing. I had a surprise for you. I took my strap on in my hand and rubbed the tip against your clit. You hit your bottom lip and smiled. I stayed in that spot and teased you a while. I turned you over and pulled your ass up by bringing your hips towards me and Ran my hands up your back all the way to your shoulders... I grabbed you and pulled you up to me and had a gentle grasp on your throat. You gasped again not expecting me to be a little tougher than usual... But again, you weren't sure if it was. Although I couldn't see, I could feel each loop of soft rope as it went around my wrists. As the last cinch loop was tightened, I realized my hands were truly tied to the chair. Quickly he followed with my ankles and I was now well and truly bound to the chair.He must have noticed the pre-cum dripping out of the head of my cock. One hand went around the shaft and with his other started spreading the liquid around the head. After a week of denial and my excitement from being naked, exposed and. "Are we on for a walk to school in the morning?" she asked me. I couldtell she was testing me, waiting to see where my loyalties lied. Thankfully, I had anticipated her question and responded, "Absolutely,"with no hesitation at all in my voice. My thoughts however, were lesscertain than my voice let on. Was I ever going to stop thinking aboutSam? I gave her a hug and she repeated the cheek kissing sequence thatshe'd implemented yesterday. I knew it would freak her out, but I decidedthat.