Sandra arrived Friday night and I waited for her with nervous anticipation at the receiving area at the airport. Don had already set up a visit to the 'doctor' for her exam and told me that the visit was also part of the screening process to see how people reacted in an unusual sexual situation. He told me I should keep that bit of information to myself for the time being but also to enjoy the doctor visit. I resisted the urge to tell Sandra about my experience during the check up and found myself fantasizing about her visit to the clinic. After all we had shared and as much as we cared about each other I felt like a new mysterious woman was arriving at the airport today.
When she saw me her face broke into a beautiful expanding smile and I felt myself react similarly. She certainly looked like the Sandra I had always known and who had been the subject of many of my fantasies when I had to take care of my own sexual cravings but at the same time their was a different air about her . I wrapped her up in a big hug and she squeezed me tightly to her, the hug lasted long enough that it attracted the attention of more than a couple of the other passengers.
We grabbed a light dinner on the way back to town and there was a noticeable sexual tension in the air.
We made our way back to my apartment, she had agreed to stay there for the duration of her visit instead of booking a hotel. We wasted no time ripping off each others clothes. I pushed her back on the bed and kissed my way up her thighs to her pussy that was already wet by the time I got there. I spent a few minutes kissing and licking her snatch, my hands up under that beautiful ass that I'd been missing. My cock was already stiff and I just wanted to feel it inside her sweet pussy. I resisted having her suck me first because I wanted to last as long as I could pounding her. Her ass was on the edge of the bed so I lifted he legs and cradled them in my elbows as I pushed my cock into her slick tight opening. I slowly sunk it to the hilt and the feeling of her cunt caressing and contracting around my dick was unbelievable. We built up our rhythm until I was pounding her nice and hard, we both seemed to need a good hard fuck and I pumped her until I felt the cum well up in me and then flood her pussy.
We laid together on the bed both lightly sweating and satisfied for the time being. I was running my hands over her perky breasts and playing with her stiff nipples. "That was outstanding," she said, "when can we do it again?"
I laughed, "Yes it was and I would love to say in a few minutes but we have to go the clinic tomorrow. They will probably want another sperm sample and they told me last time not to come more than once in the 24 hours before hand."
"So we are both going tomorrow?" she asked.
"Yep, everyone in the group has to go at least once a month and then pinky swear they haven't had sex with anyone outside the group, like I just did."
"So no more sex tonight?" she asked mimicking a young girl pouting. "What should I expect at the clinic?"
"I don't really know what they expect from women, some blood work and a pretty thorough physical exam. It's not too bad, you will probably survive it," I said with a wicked smile.
We arrived at the clinic on Saturday and like before the place was pretty much deserted except for the office we were going to. Nurse Janet was behind the glass in the waiting room once again and smiled pleasantly asking us to take a seat. A few minutes later she joined us in the waiting room giving Sandra the same stack of forms I was required to complete on my first visit. Turning where Sandra could not see her face Janet gave me a little smile and a wink and then said quite professionally, "If you would like to come back Tim, we can go ahead and get you started."
I gave Sandra a little peck on the forehead and said I would see her in few minutes, I could tell she was nervous but this is what she had signed on for. Once in the exam room Janet asked me to remove my shirt as she prepared to take my blood pressure and like before her large breasts pressed against my arm as she held it and listened with her stethoscope. The difference was this time I relaxed and enjoyed the cheap feel I was copping and once again she didn't seem to mind. She then applied some goo and contacts to me in several places all around my chest and attached me to a machine that she said measured both heart and respiratory rates and explained that both myself and Sandra would be checked to make sure that we had satisfactory responses when put under some stress. She confirmed that I was in a more or less relaxed state to start and as the monitor did it thing she place a hand on my stomach. I am sure it recorded some change in state and then she took my hand and placed it on one of her tits. It was a bit of a surprise but I had to admit she felt wonderful, even though she was wearing a buttoned up top, her breast was soft and I could feel her nipple respond. Then to my delight she started undoing her top and quickly had it open and her breasts were covered only by a thin silky top, it was no wonder I could feel her nipple through her top as they were both quite pronounced with just her camisole that was cut in a low V covering them. Her hand lightly stroked my stomach as mine sought out and easily exposed both of her big breasts with sizable nipples that were standing up nice and rigid. As I fondled her breasts her hand moved lower and started massaging my cock through my pants and I relived how she had given me a prostate massage on our last visit and wondered if there was another one in store for me. She unbuckled my belt and then undid my pants and pulled my zipper down. Reaching in she extracted my hardening cock and I felt it throb in her hand. She started slowly stroking me and told me to think about sex acts I liked performing with Sandra. She had me very excited and I was loving the view and the feel of her great tits. A couple of times she could sense I was close to cumming and then backed off, I was hoping she would finish me off. The whole time she watched the monitor to see my body's response.
All too soon she moved away from me and slowly put herself back together leaving me with a hard on protruding from my pants. She unhooked me saying I seemed healthy enough for sex and then instructed me to don one of the exam robes.