I held sis and petted her head, neck and back, fearing to touch her because of my lust for her.Sally whispered "mom left a message on the machine she ...s coming home late tonight after midnight and has a big meeting. I want us to go to my room, you and me will make out, and you are going to get lucky and don't need a condom, you will be fucking me like you always wanted to. Your going to be my only sex partner now, Josh has been fucking me for over two years, and I need a man, if you refuse then. Immediately, she cried out a "Yes!" and I kept my hand moving as I licked. Now it was time for the coup de grace, so to speak, and I hooked my fingers upwards as I stroked them in and out, feeling for her g-spot. Finding it, I started to suck at her clit while I massaged inside, and felt her tense up. "Whoa, whoa... uhm... too much coffee, I think," I heard her mumble, tentatively. "I need to... uh... go." I stopped long enough with my mouth to raise my head. "No, you don't. Just relax,. She would shudder and shake for a moment and then relax. It concerned me, and I asked her if I was hurting her and she assured me I was not. She told me that was her having an orgasm. I asked her to warn me before each orgasm so I would know what was coming.The way her pussy kept tightening and gripping my cock, and the enthusiasm of her thrusts was terrific. Aunt Bella told me it was her pussy’s way of thanking me for fucking it so well. Over and over I hammered my cock into Aunt Bella's. The goddesses of chance have strange senses of humor.The undressing was a solemn ceremony, with lots of eye contact and few smiles. I suffered the binding of my limbs to the four posts of the bed in quiet dignity. I wasn't sure I liked this game any more. Jeanine frowned, then released the cords binding my legs. She propped pillows behind my back and head, so that I was reclined, slightly. She used a single cord to bind my ankles together, and another to stretch them to the footrail.Sex slaves.