Two sides to a story

Alex's POV:

After a minute or two, I start to get a bit concerned about Jason. Surely it doesn't take this long to pee. I mean, it never use to take me this long. I go over and listen at the door for a second. I can hear him moving around in there but he's not going to the bathroom. What's the weird smell though? It's making me feel a little woozy and hot all over.

"Hey Jason, you okay in there?" There's a short pause before he responds. "Yeah. Fine." He sounds kind of mad. Shit, I need to think of a way to fix this. I knock at the door. "Can you open the door please?" I hear more shuffling and then him clear his throat. "Give me a minute!" Damn, his voice sounds so pained right now. Maybe he's in there trying to hold back tears. Doesn't he know that I'm here for him? That fact I'm a woman doesn't change anything. I just want to make sure he's alright. Huh, that smell is so much stronger than before. What is it? Focus Alex. I start knocking even harder. "Jason, open this door. I can help okay." It's quiet for a second before I hear him moving over to the door. This is great! He's going to open up for me.

Jason POV:

I just had to get away. If she said one more thing to me I felt like I was going to burst. I basically ran to the bathroom with my hand on my dick trying to stop it from swinging around. Shit. She probably saw it too. Why wouldn't Alex tell me they had taken an X-Change? Why invite me over anyway? I lock the door, stand over the toilet and lower my pants as my dick springs out looking red and rock hard. Maybe if I jerk off it will go down and I can go back out there. Think about that chick from class, what's her name? Lila? God, she's sexy. Imagine her lips on my dick. I start stroking faster at the image of Lila on her knees in front of me. "Hey Jason, you okay in there?" I hear Alex's feminine voice from the other side of the door and my image of my sexy classmate is shattered and replaced by my new step-sister down on the ground with my dick resting on her face.

I release my grip and try to clear it from my head. Fuck! "Yeah. Fine." Think of something else dammit. The porn video Ricky showed me. Yeah, that! That was so hot. I grab my dick again and start stroking faster. That chick on the bed with the guy coming up behind her, grabbing her around the waist and just slamming into her. Fuck that would feel good. Thinking about clapping those cheeks gets me hard straight away. A sudden knock at the door makes the fantasy slip away as Alex once again interrupts. "Can you open the door please?" This time instead of a porn actress on the bed it's Alex waving her amazing ass back and forth. Goddammit! Hurry to put my dick away and reach to unlock the door before stopping myself. I can't go out like this. My dick is even harder than before. There's no way she wouldn't notice. I have to finish. I bring it back out and clear my throat before responding. "Give me a minute!" If I keep getting interrupted it's going to take a lot longer than that. I try to think of something else but Alex's ass is all that comes to mind. Why did she have to wear something so tight? Did she know I was watching in the kitchen? Reach up to show off her new assets. And then jumping up and down right after. She has to have known.

I look down and my hand has started stroking my dick on its own to the thought of my own sister's body. I'm about to stop before I realize, "She can't interrupt me if I'm already thinking about her." Backward logic maybe but I need to get some release so I can leave this stupid room. I think back to the video Ricky showed me again, but this time it's Alex on the bed, shaking her ass, beckoning me over. I'm jerking off to the thought of fucking my own sister, and I've never been more turned on in my life. Thinking about how her ass would jiggle with each thrust, her calling out my name just like in porn. God, you're so big step-bro. I'm throbbing at just the thought of it. I'm getting close now. Almost there… Another banging at the door threatens to stop me cumming again. "Jason, open this door. I can help okay." For fuck's sake! Can't she just leave me alone for a damn second? Fine! If she wants to "help" so be it.