The next morning my sister walked naked to the bathroom to take a shower. She did not look at me, only at the ground. When I looked at my wife, the look of caution on her face told me that I should not try to do anything. I put on a bathrobe over my pajamas to hide my erection.
The next day when my sister was about to get on her plane, my wife hugged her, kissed her on the lips, and said, “We’re looking forward to this summer.”
My sister looked flustered before saying, “Me too.” Then she turned around and left, after waving at us.
When my wife and I got home we had several glasses of wine. “Well, what do you think?” I asked my wife.
“I think we might have been able to do it this visit,” my wife said. “I would rather your sister spend the rest of the school year looking forward to this summer, and wishing that we had. These things take time.”
“Why do you think she showed herself to me naked?” I asked.
“She wanted to see if you would disapprove. Girls that age like to explore their sexuality, even if they are not in a hurry to have sex. She might do that with your father now and then.”
That night, my wife and I made love more passionately than usual. When we were looking at each other during the afterglow I said, “The thought of my sister has done wonders for our sex life.”
“I think she might be bi too,” my wife said. “I look forward to watching the two of you together. I look forward to you watching your sister and me together.”
My sister was delighted when I told her that I had gotten a paid internship for her at my university. My parents were glad too.
During the rest of the school year my wife and I wrote letters to my sister and called her on the telephone. She was glad to hear from us, and said she was looking forward to the summer. I still did not know if we could seduce her. I did not know if we should. I only wanted that to happen if she wanted it to happen. I wanted her first time with me to be the most wonderful event in her life.
The night of the senior prom for my sister’s high school graduating class my mother called me on the phone. She told me that my sister was depressed because no one had asked her to the prom, and asked me to call back in an hour and talk to her.
When I talked to my sister I told her that I had not gone to the senior prom either. I said that I was not dating anyone regularly. I had made a list of girls to ask. When the first one turned me down I was too downhearted to ask the second one. I told my sister that she was beautiful, but shy, and that the shy boys who were also home alone on prom night, and who wanted to ask her, had needed some encouragement.
After that conversation, I had another conversation with my wife when we were lying in bed together. I told my wife that my sister’s loneliness made her easier to seduce, but increased my guilt for taking advantage of it.
My wife reminded me that we were not going to pressure my sister into doing anything that she did not want to do. When my wife removed her nightgown to make love to me she said, “Do not pretend I am your sister. Know that I am the wife who loves you.”
When summer finally came my sister drove her car to our house with the belongings she would need for the summer, and the fall semester. We helped set her up in our guest room, and drove to a restaurant to celebrate her visit. Those at the restaurant envied me to have the company of two such beautiful females.
“I’m looking forward to using your hot tub,” my sister said.
“Your brother and I are naked when we use that,” my wife said, “but we will wear bathing suits for your visit.”
My sister looked down with a shy smile.
When my wife and my sister helped my sister unpack I noticed that she had a bikini razor. “You told me to bring a skimpy bikini,” she told me. “So I decided to shave my bikini area.”
She was not kidding about the skimpy bikini. That evening when we got into our hot tub her bikini consisted of a small triangle of thin cloth to cover her vulva, and two smaller pieces of the same thin cloth to cover her nipples. These were held in place by strings. The imprint of my sister’s slit and her protruding nipples were clearly visible.
“You are hardly wearing anything at all,” I told her trying to sound mildly disapproving.
“You have already seen me naked,” my sister said, “You are my brother anyway, so it doesn’t really matter.”
“I’m glad there is no beach around here for us to take you to,” I said. “I would have to fight off the men with an assault rifle.”
My sister laughed teasingly. “I would not walk off with one of them.” When she saw the erection pushing against the constraints of my swim trunks she looked pleased.
I wanted to lift my sister out of the hot tub and carry her into our bed room. My wife held my fingers and squeezed them in a way that said, “Not yet.”
After this session in the hot tub, my wife closed the door to our bedroom, so that we could have some privacy while discussing the progress of our seduction of my sister. “How do you think we’re doing?” I asked.
“The fact that your sister wore such a skimpy bikini was a good sign,” my wife responded. “It was obvious that her nipples became erect with arousal under that diaphanous cloth. Her body was wet all over because of the hot tub, but I am sure she lubricated. We probably could have taken her, but I would rather draw out the tension. Let’s see how she behaves tomorrow, and see if she projects guilt or pleasant anticipation.
“You’ve known your sister longer than I have, but I think I have more insight into the psychology of a teenage virgin girl. I am confident that right now she is masturbating thinking about you. As we make love, pretend that I am her.”
The next morning my sister walked naked to the bathroom and back for her shower, as if showing herself naked to me was the most natural thing for a teenage girl to do with her brother. My wife looked knowingly at me, and smiled faintly.
A week later we celebrated my sister’s eighteenth birthday at an elegant restaurant I took my wife to for wedding anniversaries. In the evening my sister suggested another session in the hot tub. This time she suggested that we all be naked, “Because that is what you’re used to, isn’t it? A girl should be able to show herself naked to her brother.”
When my sister stepped naked into our hot tub I was speechless with awe about her beauty, and the possibilities it gave me. She, in turn was unable to say anything about my erect penis, and what I obviously wanted to do with it.
After a long and awkward silence my wife said to my sister, “You are lovely my dear. Your breasts are large, but firm. Your areola’s are perfectly round, and the same delicious shade of pink as your lips. Your nipples are erect with arousal. Your lips and nipples beg to be kissed.
“Your stomach is taut, your waist is narrow, and your rounded hips beautifully frame your shaven vulva. You have a slight mound, a well defined slit, and no clit hood. It does not get better than that.”
My sister responded to my wife’s accurate description of her body by breathing deeply with her mouth slightly open. Finally, my wife said, “I want so much to lick your vagina. May I?”