I highly recommend you read at least part 6 before diving into this one.
*****
Zach stepped in the room, completely naked. He motioned as if he were clapping and I wondered how long he had be there. He crossed the room, quickly putting his hands on my back. He kissed my neck, before pushing my face back to his sister's sopping pussy. As I bent forward, he ran his hands down my back and onto my hips. He pushed his hard cock in between my ass checks and humped against me. I was already soaked. It did not take but a few moderate thrusts to have his cock buried deep in my cunt.
It was times like this that I wish I had a video camera hidden in my bedroom. What a scene it must have been. The tight body of Joslyn lying across the bed with her arms tied above her head and her eyes blindfolded. My face pushed into her pussy while I ever so calmly dildo fucked her ass for the second time that night. My ass high in the air while Zach stood at the end of the bed, smoothly forcing his cock into my slippery cunt. It must have been an incredible view.
After several minutes of the nice and easy pace, Zach gripped my hips tighter. I knew he wanted to fuck me fast and hard. I lifted my face from Joslyn's clit, slowly pulling the cock from her ass. I set it aside as she let out a whimper, twisting her face in disappointment.
"Don't worry," I explained to her. "I've got another surprise."
I climbed off the bed, pulling my strap on harness from the nightstand drawer. As I stepped into it, I looked over at Zach who was stroking his rock hard cock. He was watching me, and then turned his attention to his exposed sister. He licked his lips as if to tell me all the things running through his head. He looked back at me, and with a very stern look I conveyed exactly what I was thinking. He was not going to fuck her without consent. I already felt bad about sneaking this threesome onto her. I was not about to let him fuck her while she though it was me. I would have to slowly introduce him into this, but I still was not sure what to say.
I tightened the straps of the harness and slid the cock in place. I walked back to the foot of the bed and climbed up. I pulled Joslyn's legs up, so that her knees were at her chest and I bent forward. I rubbed the cock against her wet pussy as I spoke very softly to her.
"I have a friend that is going to play with us, is that okay?" I asked her as reassuringly as I could.
"Ummm... Okay." She looked confused. "Who is it?"
"It's a surprise. But he isn't going to do anything to you without your permission," I shot a look back at Zach. He shrugged and then nodded in acceptance.
"Okay!" Jos said, seemingly excited about the whole thing.
I spread her legs to the sides of my body and leaned down to her. I continued rubbing the cock against her pussy as I licked and sucked on her nipples. I felt Zach's hand on my lower back as he climbed on the bed. He kissed across my shoulders and down my back. I heard him spit on his cock as he began stroking it again. I sat up, leaning against him and kissed him deeply. He positioned his painfully erect dick right at my pussy lips as I did the same with the toy to Joslyn. He nodded and we both pushed forward, his cock sliding into me and mine into Jos. She and I both let out moans. Zach slowly found a nice rhythm and I followed his lead. I slid off his cock and into his sister, and the out of her and back onto him. We moved like this, while he pawed at my breasts. Soon I could feel my pussy aching to be fucked harder.
I leaned forward, my hands at Joslyn's shoulders. She wrapped her feet around my back as we kissed. Zach let go of my breasts and took ahold of her knees. He pulled on them, lifting her tiny body off the bed as I sank into her. She moaned with joy as I hit deep in her soaked cunt.
"I'll untie your hands," I offered her. "But! You must leave your blindfold on for now."
"Okay she nodded."
I sat up to release her hands, but Zach did not let go of her knees. He continued to push me into her as he thrust his cock deep into me. When her hands were free, Joslyn immediately found my tits, pulling me down so that she could take one in her mouth. She flicked my nipple with her tongue, squeezing the other. I tossed my head back as the new sensations sent shockwaves down my body. Zach leaned forward, balancing himself on the headboard. His long arms gave me plenty of room between Joslyn and his warm body, but I wanted to feel them both.
I lowered myself onto Joslyn, pulling my nipple from her mouth and smashing my enormous breasts against hers. I steadied myself on my elbow, reaching up to pull Zach's arm down next to mine. The three of us worked like a well-oiled machine, thrusting in perfect unison. Soon we were all fucking each other hard and quick. I kissed Joslyn, then leaned back and kissed Zach. As my body was turned to him, he moved his free hand to her exposed tit, grabbing the whole thing in his giant hand. She let out surprised a moan and I turned to see what he was doing.