Time seemed to stand still for Kim and myself, she spent as many as three nights a week at my place, and once in a while we would turn my office into our own little love nest. I never regreted giving Kim a job at the books store. One evening after the store closed and Kim and I had finished our "inventory" , she leaned on her elbow and told me something that I didn't bother to think about but should have. "We have a problem honey." I looked over at Kim and asked what the problem might be. "I believe that your sister Terry knows about us." Kim let me digest that information for a moment. I moved to the couch where Kim sat,and while I replied with measured tones I ran my fingers over Kim's hard nipples. "It wouldn't surprise me honey, my sister Terry isn't blind." Pushing my hand away from her breasts gently she sat up and asked, "What do you plan to do about it if anything?" I shrugged my shoulders and answered her question with a question. "What would you like me to do?" Kim said nothing for a moment. I had a secret that I knew would have to come out, and now was the time to tell her all. "I think it's time we came out into the open." Kim said softly. By now my fingers were stroking her cum covered pussy and I could see that Kim was once again enjoying the pleasures of arrousal. "Christ, you sure know how to get my motor going don't you." she sighed and kissed me. "So you really want our relationship out in the open Kim?" I asked. "God!Yes!" Kim moaned as she held my hand between her legs. "Now make me cum again love. Hurry!"
I was happy that Kim and I were going to be open about our relationship from now on, but the secret I had could break my relationship off and I didn't want to loose Kim since I felt sure that Kim would now have objections about ever being seen with me once my secret was out in the open. "There is one small item that you should know Kim, before you really say yes to going out with me." I said, my fingers were working her pussy hard. I started with the truth, it was the only way to go. "The reason my sister Terry suspects that something at all is that before my sister married, my sister and I used to fool around with each other,she was the first female I ever saw naked." Kim looked me straight in the eye and said,"You're kidding me, you fucked your sister?" I could see that this was going well. I continued my finger work. Kim was writhing with pleasure. "No Kim, I didn't fuck her, we used to just get each other off that's all." Kim didn't slap my hand away so I kept going. "Ok, out with it, tell me what you did." Kim's breathing became harsher her voice thicker, her body undulating more and more. Kim was turned on by my admission of having an affair with my sister! I took a deep breath and told her how one afternoon my sister accidently walked in to our bathroom not knowing that I was just getting out of the shower and how I left the bathroom door unlocked by accident. "It's all true Kim, you can ask my sister if you want." Kim groaned and said, "You still didn't tell me what you two did. Oh dam, make me cum honey and tell me all, then put your cock inside me again, I'm heating up." Kim's body arched off the couch.
I now told Kim how I forgot to lock the bathroom door one afternoon while I was in the shower and when I opened the shower door there was my sister, her bathrobe already half open ready to hit the shower herself. "Oh, Shit!" We said as one. I know my face was red hot. Until that moment I had never seen a naked female up close, it was a dream come true, and my cock was rock hard just from seeing my sister's near naked body. It was to late for me to cover up so I just stood there looking dumb and Terry was the first to speak. "Well, well, I see my little brother really isn't so little anymore is he?" I still couldn't find my voice. I did see a strange look in my sister's eyes. "Do you know how to play with your cock there Sean?" Terry's voice had become huskier sounding. "Care to do a little masterbation for me?" She went on. "Humm, I believe your better hung than my boyfriend." She told me as she reached out to carress my cock. I squirmed like a worm stuck on a hook. Terry seemed happy just to stroke my cock. Terry chuckled and told me that she now wanted to see me to cum. Then I did something bold, I pulled my sister to me and I kissed her full on the lips, my hard cock pressed against her naked belly and I pushed her partly opened bathrobe from her shoulders much to my surprise Terry didn't pull away. "Not bad little brother, now I'll show you how to kiss." With one motion, Terry slid her tongue into my mouth while she guided my hands to her breasts. With a sigh my sister said, "You're an eager beaver aren't you?" I found my voice. "Who wouldn't be after seeing you naked sis." Kim's body shuddered as I drove my finger deeper into her pussy, Kim climaxed before I could finish my story. "Finish your story, you promised." Kim sighed as she licked my juice covered finger. "Are you sure?" I responded. Kim just looked at me and said nothing, so I went on. I told Kim that my sister stepped away from her fallen bathrobe and we now stood in front of each other completly naked. Terry asked me to get on my knees and to put my mouth on her pussy which I did then Terry held my face between her legs and she moaned, "Oh my Sean! Lick my pussy harder! Make me cum!" My sister had to lean against the sink and she dug her fingers into my scalp while my tongue licking up her salty pussy juices till she climaxed after which she had me strech out on the floor where she started to suck my cock. "If you promise never to tell anyone, I want us to do this again Sean, often." Terry told me in between mouths full of my cock. I gave her my word. Terry sucked my cock till I came in her mouth. I watched her take it all when she was finished she licked her lips happily. After that day when ever we could find time we would get together and have our special cum party. Terry loved to have me cum on her body or in her mouth, but I never did get the chance to penitrate her, she wouldn't let me. My story was finished, Kim didn't say a word but she bent over and took my cock into her mouth and started to suck on it slowly until I eventually came. Her only words were, "You like the way I suck your cock?" My only answer was a groan of pleasure.
