Sis loves bro's big cock for bj and ride - our parents are gone on a trip, so we're finally home alone. Like every teen, I'm concerned about my weight, I'm insecure of my body, I ask my bro if he can check whether I'm fatter than I used to be, my boobs seem bigger, my ass rounder and curvier... as I show him my problem areas, he's starting to be aroused, and starts to rub his cock through his pants... I notice something growing in between his legs... I wanna touch it... I pull him by my side, take his pants off, and my first instinct is to put that big fat cock in my mouth... mmm, it tastes so good, I think I'm ready for more... are you ready to put that big fat dick in your sister's pussy? I remind you that we are brother and sister, but temptation is too big...