Enter the living room with mom

I see Rachel standing up off the couch and starting to take her clothes off when I peek my head inside the living room. I just watch as my sister strips every piece of clothing off and tosses it to the side. Once Rachel is completely naked and sits back down on the couch, I enter the living room with mom, who is still playing with herself. I stand right in front of Rachel, blocking her view of the TV, with mom standing right next to me. "Can you move, John? I'm trying to watch-". Rachel stops talking as she now notices that mom and I are naked.

I notice that Rachel is staring more at mom's body than mine. Rachel is staring mostly at mom's big titties but does look down a bit to see mom playing with herself. I don't think Rachel has noticed how big my cock is yet. "Mom, what happened to your breasts? They weren't that big before. And why are you playing with yourself? What's wrong with you?" The app is definitely working on Rachel, given that she's not bothered by the fact that mom and I are naked. But I didn't think to put into the app that Rachel wouldn't notice that mom's breasts are now bigger or that she wouldn't be bothered with mom playing with herself right in front of her. No problem. I can easily fix- "What are you talking about, Rachel? My titties have always been this big. And how can I not play with myself while looking at my own daughter's naked body? You have such a sexy body, Rachel."

Well, thank you, mom, for starting to solve this problem for me. "Mom's right. What are you talking about, Rachel? How could you not notice that mom's titties are this big? I mean, look at them. And you don't have any problem with mom playing with herself. You were already getting horny from looking at mom's naked body. But you're getting even hornier from watching mom play with herself. Seeing mom playing with herself is making you want to start playing with yourself, Rachel." After I say this, Rachel spreads her legs apart, then slides her hand down toward her pussy and starts to play with herself, just like mom. Rachel continues to look at mom while she plays with herself. But I think Rachel is listening to the TV as well. "You're right. I guess I'm just so jealous of mom having bigger tits than me that I thought they'd gotten even bigger somehow. You can play with yourself while staring at my naked body whenever you want, Mom. That is if you're okay if I play with myself while staring at your very sexy body whenever I want."

"Of course, you can, Rachel. You can play with yourself while staring at my naked body whenever you want. You have no idea how proud I am to see that you're a slut just like me, Rachel." I see Rachel rub her pussy faster after hearing mom call her a slut. I find it kind of funny how mom is jealous that Rachel has a bigger ass while Rachel is jealous that mom has bigger tits. I'm starting to get annoyed listening to whatever dumb reality show Rachel currently has on the TV behind me. I grab the remote and turn the TV off. "Hey! I was watching that!"

"You don't like watching reality shows, Rachel. You think they are dumb."

"You're right. Why was I even watching that terrible show anyway? Thank you for shutting off the TV for me, John." I watch Rachel as she continues to play with herself for maybe a minute long. And as much as I'm enjoying seeing this, there's something else I really want to see. "Hey, Rachel. Could you get up and turn around for me? I want to see that big, round ass of yours. You're okay with me looking at your ass, right, Rachel?"

"You would ask me to show you my ass. Sure, I'm okay with it. Give me a sec." Rachel stops playing with herself and gets up off the couch. She turns around and bends over, letting mom and I have a good view of her ass. I always have this debate inside my head about whether I'm an ass man or a boob man. I honestly can't decide which I prefer more. I love both of them equally. I love a woman who has both big titties and a big, round ass. As I continue to stare at Rachel's ass, she says, "I'm sorry for all the times I yelled at you for staring at my ass, John. I don't know why I yelled at you. You're my younger brother. You should be able to stare at your sister's ass whenever you want." I noticed that Rachel didn't turn her head back to look at me when she was talking just now. Her head is still looking straightforward.

"It's okay, Rachel. I forgive you for all the times you yelled at me. Could you shake your ass for me, Rachel?" Rachel does what I tell her to do and starts shaking her ass right in front of me. "I'm so glad you forgive me, John. I bet you've never seen a woman who has a bigger ass than mine." Well... There is one woman in my mind right now who has a big ass. But I don't know if her ass is slightly bigger or smaller than Rachel's. I know that she definitely has a bigger ass than mom. But I would have to put Rachel and the woman I'm thinking about next to each other to know who has the bigger ass. For now, I tell Rachel, "You're right about that, sis. Please continue shaking your ass for me. I'm going to take a video of you. You don't have any problem with me taking a video of you shaking your ass, Rachel."

Just like I said I would, I pull the camera up on my phone and start taking a video of my sister. I record Rachel shaking her ass for a full minute before I stop recording. After I stop recording, I bring the Alteration App back up on my phone and quickly type, Rachel doesn't have any problem with ****. Rachel finds **** to be really hot. Rachel is turned on by the idea of having sex with her own brother, John. Rachel will become extremely horny whenever she sees her brother's big, hard cock. Rachel wants to have sex with her own brother, John, whenever she sees her brother's big, hard cock. Rachel will obey every order that her brother, John, tells her to do. Rachel loves obeying her brother, John. Rachel will not question or hesitate in doing any of the orders her bother, John, gives her. Right after I tap enter, mom says, "Can you please send that video you took to my phone, Master? Please?"

"Sure, Mom. Remind me to do that later." Mom is still playing with herself. She hasn't moved her eyes away from Rachel's ass once yet. In my mind, I think, "Hard," and my cock becomes fully erect. Rachel turns her head to look back at mom and me. "Mom, why did you call John Ma-". Rachel stops speaking and stops shaking her ass as she now notices my cock for the first time. I look at Rachel's eyes and notice they are filled with lust.