While walking down the hallway, I heard a vibrating sound and peeked through the open door to see my sister masturbating while reading a yuri comic. Seeing this, my excited brother couldn't help but reach for his crotch. Several hours later, when I passed by her room again and took another look, Lara seemed to have orgasmed and fallen asleep. The room was filled with a lewd scent, and once again, my brother became so aroused that he couldn't stop, even smelling my sister's hair while masturbating. That's when my sister woke up. My brother apologized profusely for using her as a masturbation aid. However, my sister found it amusing and suggested practicing footjob with his penis. Lara gradually became more excited watching him. And then…
