"Big brother makes my pussy bigger with toys..." "Yes!" "I want to have sex with my boyfriend..." My younger sister consults me that my boyfriend's dick is too big and I can't have sex.

My little sister goes home, feeling depressed on her way home from a date with her boyfriend. Her younger sister, who fails to have sex, shows a brave appearance that expands her pussy. I've noticed my younger sister masturbates like that every day... I'm at my limit and I say, "It's because it's easier to expand and put my boyfriend's big dick in..." and have practice sex with my sister every day! Even though my younger sister's practice, she gradually awakens to the pleasure of sibling sex... By the time I realized it, my brother and sister had started having harder sex than they practiced.