A change in the routine

The next week starts out just as the previous one. Emily comes home, fucks Eric, and feeds you some of their cum. You cook for her and clean for her, and you feel like you are starting to get used to this routine. And at the end of the day, Emily always sneaks in to your room with a new pair of panties for you to wear for the following day. At first you thought it was so humiliating, but seeing Emily glow up as she sees you in them has you wearing them with pride.

Then on Thursday afternoon, something changes. You sit, eagerly awaiting Emily's text, warning you that she is about to come home, and for you to hide, but no text ever comes. Suddenly you hear the front door opening. Maybe she forgot to text you. You hide in your room, as you prepare yourself for the highlight of your day. Then you hear your door open, and Emily stands there.

"Em, what are you..." you say. "Where's Eric?"
"He's not coming today." You can see her disappointment clear as day. "He said he was busy. That's bullshit, I think he's getting tired of me!" Emily is clearly upset, and you can see that tears are starting to form in her eyes. You get up to comfort her, hugging her tightly.
"That's nonsense Em, nobody would ever get tired of you. He'll be back, I promise" I say, as Emily meets my embrace. We hug for a moment, as her sobbing gets quieter and quieter, and she hugs me tighter. She looks up at me, and smiles.
"Thank you John. I needed that. You are so good to me, you know that." Her expression changes from somber to cheerful once again. "We will just have to figure out some other way to get me to cum today, won't we? How about you show me some of your favorite porn?"

Before you can ever register what she says, she has bolted into her room, and shouts for you to get in there. As you get into her room, she lies on the bed, with her laptop in her knee. "Get undressed and get in bed" she says eagerly, as she opens up Pornhub. As you push your pants down she stops you. "Leave the panties on" she says.

"Now I don't do this very often, so you will have to guide me." she says, handing the laptop over to me. "How about you show me exactly what you watched that day I caught you." You turn red. You were watching a video of a girl who resembled Emily. You know she will tease you for that, but then again, what other option do you have. You type in Alex Adams in the search bar, and videos titled Step-Daughter, Step-Sister and Family Therapy pop up, much to Emily's delight.

"Oh John, is this the kind of porn you usually watch? Good thing you don't have to watch porn anymore." She looks at you, clearly enjoying the embarrassment visible on your face. You could easily lie, and just put on a random video, but you decide to show her the truth, as you pull up the video from that day. It doesn't take Emily long to realize.

"Oh my god. This girl kind of looks like me! Is this what you usually get off to? Is she your favorite porn star?" You are bombarded with questions from Emily. You try to explain that it was just a coincidence, that it was the latest video that day and that you have never seen this girl before, but you don't think that Emily fully buys your excuses.

"Whatever you say perv." she says. She pulls up a little bag from her nightstand, and pulls out a blindfold from it. "Now put this on for me sweetie. This is already way more than you deserve" You feel a tinge of disappointment. Of course she wasn't going to let you watch her touch herself. But at least you will be close to her, next to her. You put the blindfold on, and try to focus on your other senses as your vision turns black. Emily turns the laptop a bit, still leaving it in your lap, as you hear her toss her pants off, and she hits play.

Your senses are overwhelmed as you hear the porn video playing, and Emily next to you, softly panting. You can hear a faint squishing sound, which must be her fingers digging themselves deep inside her pussy. The weight of the laptop helps push the cage against your cock, as it swells from the scene playing out around you.

"Oh my, he is almost as big as Eric" you hear her say, referring to the cock in the video. Your cock struggles against its captor as you imagine Emily getting fucked by her boyfriend, with a cock big enough to rival a porn star. You lay there, listening to Emily moan louder and louder as the video gets more intense, her moans mixing with the porn star in the video. You can feel her skin next to yours, as you realize how close you are to your naked sister, and you want to do nothing more than to tear this blindfold off and fuck her. But of course, you can't do that with your cock in a cage.

Then suddenly, you hear Emily's moans increase in intensity, realizing she must be close to climax.
"Oh god." she pants. "Oh fuck. I'm going to cum. I'm cumming Johnny!" You can feel the bed shake as your sister climaxes next to you, before she pauses the video and takes a moment to compose herself.

"Oh my god. Was that as good for you as it was for me?" she says teasingly, laughing a bit. She catches her breath for a minute, before getting up. You are still blindfolded as you feel something soft and damp enter your mouth. The smell of it is lovely.

"I'm gonna go take a shower. Be a good boy and wait for me here won't you?" she says, laughing as you hear her walk out of the room.