"Nina was breathing in gasps as each of the beads went into her ass. Once they were all in, there was the ring at the end of the string that Bill knew...how to use. Bill signaled to Tom that it was time for him to pick up the speed of his thrusts into Nina's pussy. Tom started to do that, as Bill put his big finger into the ring. He waited until he could see Nina building up to an orgasm."Oh god, fuck me! You are going to make me cum!" Nina yelled at Tom. Bill waited until she began to orgasm,. ”“A specific nerve ending, such that they would feel something at a particular place?”“Yes.”“Good. More than one place? At the same time?”“Yes. However unless the nerve endings are adjacent, it will need two or more nanites at a time.”“Okay. So to stimulate a bundle of nerves?”“Stimulating a single ‘bundle’ will take one nanite.”I nodded to myself.“How long would it take to get a couple of nanites into position?”“The blood stream is very fast so not very long.”I nodded. “Move a couple of. In a little bit more, and back off to regroup. It was agonizingly slow, but the end justified the means. She whimpered each time I began to back out, but she enthusiastically helped me when I pushed deeper. When I finally bottomed out in her, our pubic bones grinding together, she let out another soft sound of intense arousal."Boy," she whispered, happiness evident in her voice. "There's no feeling quite like nice hard boy..." Her eyes were closed in concentration and ecstasy. I felt her wrap. The next day was a Saturday and we were home with no program lined up. I was horny and hungry for a dose of lactic supplement! After baby was put to sleep the three of us were in the bedroom chatting. I was in my shorts and t-shirt and my wife was looking sexy in her thin dress that reached upto her thighs.To my delight Sudeepa too was in a stringy chemise that barely concealed her black panties…quite bold of her I thought but then she was single now I guessed. Suddenly my wife and Sudeepa.