I can't believe mom and dad took us to Vegas and then left us alone in the hotel while they went out to have fun. Ugh, now I'm stuck here with my little brother and nothing to do. I want to take a bath but you won't get out. That's when I notice that your eyes are glued to my tits as they swing back and forth in my sheer halter top. It's kind of weird that you're staring at your own sister's tits, but I have to admit it kind of turns me on. I take my top off and press my naked breasts against the window, showing off for the tourists down below. Turns out I like showing off my body, especially to my little brother. You're getting hard in your pants, and I invite you to take them off. I love what I see, and I take you in my hands, then my mouth, and then I sit back and spread my pussy lips, taking my little brother's cock deep inside me, begging you to fuck me until we both cum.
This is a slow-moving roleplay with lots of dialog building up to the fucking (simulated using a flesh-colored dildo