I want to thank everyone who has given feedback on the previous chapters. There is a prequel story in the works as well. I also want to thank Bigbeautiful for editing this story and suggesting the ending for it.
As I think back on that spring night when my wife's sister Andrea and I first fucked, I realize what a lucky guy I am to have had sex with two sisters. I hadn't realized until that night that Andrea had known that I spied upon her as she changed clothes in a cabin that we had shared at a historical reenactment event. I thought that I had faked being asleep. But as I had walked her back to her cabin that fateful night, Andrea told me she had known that I spied on her, and that she enjoyed showing off her body. She had been losing weight, and even though I was married to her sister, she enjoyed the fact that I wanted to look. When I asked her if this would ever happen again, and she said, "I won't say no, especially after enjoying that cock of yours."
My wife benefited from my encounter with her sister, though she didn't know it. When we got home from the event, I proceeded to fuck her brains out. While Andrea's tits are small and perky, Dana's breasts are large and are fantastically proportioned. I didn't think that I would get to experience Andrea again, but luck would be on my side.
The holidays arrived, so I would get a chance to see Andrea. We don't live close by, and my job makes getting together except for special occasions rare at best. Things were different; she was pregnant by her husband Joe. The few times I had seen her in person, and from the pictures of her on the internet at the various reenactment events that I couldn't attend hadn't changed my opinion of her. She was still damn hot. Pregnancy puts a glow on a woman, and adding to that to her natural beauty made her hotter.
Joe and Andrea were having a New Year's Eve party. Dana and I were invited, as were Jack and Mary. Jack is Andrea and Dana's brother. Since I didn't have to work that day, I was going to meet Dana at Andrea's since Dana was working. The weather was fine when she left for work, but later that morning it started snowing heavily. Her boss, being the taskmaster that he is, wouldn't let anyone go home early.
Meanwhile, I got ready to go to Andrea's. While in the shower, I thought about the changes in Andrea's body. I wondered if her breasts had swollen. I thought about her rounded belly, and I began getting aroused, my cock rising to attention. I knew that I needed relief, so I took some soap in my hand and slowly stroked myself, imagining that my hand was Andrea's mouth. I slowly picked up my rhythm as I imagined that I was taking her from behind, finally cuming in explosive relief. I finished my shower, got dressed, and headed to Andrea's.
When I got there, Mary greeted me at the door. She helped bring in my overnight bag, and the wine that I had brought. Even after three kids, Mary still looked damn good. She was wearing a cashmere sweater that housed her small breasts and slacks that showed off her well-shaped ass. I had often wondered what she looked like naked. I had never tried to find out, but then I never tried with Andrea either. Like Dana, Jack was stuck at his job.
I went into the kitchen, and there was Andrea. She looked great. She was wearing a spaghetti string maternity dress that showed off her shoulders, and tried to hide the child growing inside her. Her breasts were larger than I had fantasized about in the shower, and I couldn't help but smile. I walked over and gave her a hug and a brotherly kiss on the cheek.
"Is it still snowing out there, Brad?" she asked me.
"Oh, yeah, it's still coming down pretty good," I told her. "I hope that Dana and Jack can get here safely."
"Me, too," she told me. "Fix yourself a drink. I was going to try to hold dinner, but Jack and Dana both said to go ahead. I'll fix them both a plate in case they can still get here."
"Where's Joe?" I asked.
"He's stuck in Columbia, getting Karen." Karen is Joe's daughter by his first wife. "It stinks that he can't be here."
"Oh, I don't know," I said as Mary walked into the kitchen, "Being stuck alone with two beautiful women seems like my kind of New Year's Eve."
Mary and Andrea both laughed, and Andrea said, "More like one beautiful woman and a blimp." Mary came over and rubbed Andrea's swollen belly.
"No, Andrea, Brad's right, you are even more beautiful than usual," Mary consoled. Was it my imagination, or was Mary rubbing Andrea's belly in a more than friendly manner?
