On a sweltering summer day, my sister's attitude took a drastic turn when she found out I had a girlfriend. She's all sweaty and clingy, her bra-less camisole revealing her ample cleavage, desperately trying to seduce me. It's too much! Even though we're siblings, my dick is about to explode! We finally gave in to our forbidden desires, our bodies drenched in sweat as we had a passionate, sticky sex session. Afterwards, we even tangled up in the bath, shooting off in a frenzy. The house is filled with the scent of our sweat and love. Her pussy is more erotic and shameless than my girlfriend's, and her teasing skills have been amplified by jealousy, leading to multiple orgasms. Even with Mom around or while I'm on the phone with my girlfriend, I couldn't resist fucking my sister over and over again... .