All persons in this story involved in sexual situations are at least 18 years of age.
*****
Breakfast was, shall we say, a bit awkward. Of course Mom and Gracie were both talkative, and Adrienne happily joined in whenever it was appropriate. She was good at conversation even when her mind was on other things.
I hadn't said a word to Katy since Adrienne had begged me to fuck her last night, but she knew the overall plan. She knew I had told my wife that she shyly admitted to me how our childhood sex games still turned her on and she thought of them with fondness. That part wasn't even a lie, so it was easy for us to go along with it. What Katy didn't know was how Adrienne had told me she would actually be ok if we were already fucking. She was fine with the truth even though she didn't know it yet. Maybe she would never know it fully, but I was looking forward to telling Katy all about that, and all that transpired last night.
Katy kept glancing between Adrienne and I as if she was trying to ascertain something that was as of yet unspoken. Adrienne almost did the same, and I just knew she was mentally picturing me fucking my sister. I still couldn't believe my luck, marrying a woman who was into incest to the degree that she was. It wasn't just a role playing fantasy anymore. She wanted me to indulge in the forbidden fruit of my own flesh and blood.
Katy soon excused herself from the table and left breakfast in a hurry of sorts. I was confused why she did that, but she never did anything without planning ahead. She was trying to get me alone, probably, and this was her way of doing it without outright asking me in front of everyone. Mom barely noticed, since Gracie was distracting her with stories of her schoolmates from first grade. Adrienne, however, didn't do a very good job of hiding her reaction. She moved her head as if to gesture to me to go follow Katy. I announced that I needed to go to the bathroom, and I left the kitchen and headed downstairs to my office, where Katy was staying.
What the fuck was happening here? I wondered to myself. Being pushed into doing something that would normally be considered unforgivable, when you've already done it to death, was a really bizarre headtrip. I couldn't exactly spend a lot of time down here either, since the whole family knew I was supposedly just using the bathroom. This wasn't a fuck session, even if that's what Katy or Adrienne wanted. My wife wouldn't expect me to rush into it anyway, not like that. She would want me to slowly build up to it, plant the seeds in Katy's mind and make her come to me.
Damn, that was a good angle to play. It turned me on just thinking about it, even though there was no going slow with Katy. I could rip her panties off and fuck her raw at any moment and she would be down for it without hesitation. It would all be for show, for Adrienne's sake, but it would actually be really hot.
I went into the bathroom, ignoring the door to my office even though I knew Katy was waiting in there. I just stood in front of the mirror and waited in case she decided to come in here to talk to me. She didn't, so I waited about a minute and then went after her.
I opened the door to my office without knocking, and Katy was sitting on the foldout sofa bed patiently waiting for me. I closed the door behind me, and we locked eyes.
"That wasn't very subtle," I said to her, reprimanding her for being so obvious at breakfast.
She waved the thought away. "Mom won't think anything of it. Are you here to tell me about last night? Or...something else?"
She was itching to take her shorts off, but I shook my head. "No, we don't have time for that. But you will be pleased to know what's in store."
She leaned forward excitedly. "Yeah?"
For some reason I was unzipping my pants and taking my semi erect penis out of my fly, and I moved it near her to touch. She played with it immediately, keeping eye contact with me though as I spoke. This wasn't so we could fuck, as I had implied just now, but it was just to tease her.
"We get to play a game," I said. "It's called, 'See if you can get your husband to fuck his sister' and it has to be played secretly even though Adrienne knows it's being played."
Katy's eyes went devilish. "She wants you to fuck me?"
I nodded. "She begged me to do it, after I fucked her ass and she licked mine while I came all over her face."
Katy moaned, audibly though no one outside the office would hear, and she lowered her head to my penis. She inhaled it and started sucking. I groaned at the feeling, but kept talking as I stroked her hair.
"I gave her every opportunity to recant, but she persisted. She really wants me to convince you to have sex with me. She thinks the 'signal' you gave me about being aroused at the thought of what we did as kids is a sign that you want it."
Katy was really getting hot by this, and she deepthroated me and held it for a good few seconds before pulling back and looking up at me with fire in her eyes.
"Can you cum?" she asked. She knew we didn't have long, but she really wanted my load in her belly.
I sighed. "Of course I can, but I think it would be better if we played the game. You know, held off and dragged it out like Adrienne expects. She's gonna want me to keep talking to you, alone, to slowly convince you to fuck me."
"I want to fuck you right now," Katy said, jerking my cock in full handjob mode.
I backed away and stuffed my penis back into my pants. "Don't worry, you'll get to. You'll get all you want. Don't you see what's happening here?"
She calmed a bit when I put my penis away. Its presence always made her hot beyond belief, ever since we were kids. She pondered what I just said and looked at me questioningly.
"What?"
"You're going to move here," I replied, "probably live here with me if you want to. You're going to make a new life and we'll be together again, permanently. And best of all, we'll be fucking all the time and we won't have to hide it from Adrienne."
I couldn't believe it but Katy looked to be tearing up as she thought about it.
"That won't make it less appealing, I hope," I said.
She frowned. "What won't?"
"The fact that it won't be quite as secret anymore."
She stood and approached me gently, opening her arms and embracing me softly. She moved to kiss me and her lips touched mine in the sweetest kiss she ever gave me. We had kissed many, many times, and it was always emotional and lustful. But this was like a kiss of soulmates, something entirely different.