On the first day of a long holiday, my mom went to visit my dad who was on a business trip, leaving me and my sister alone for five days until the end of the holiday. Taking advantage of this, a stranger broke into our house！！The perpetrator tied me up and raped my sister right in front of me！！I wanted to help but couldn't！Yet seeing her face as she was being violated made me hard. On the third day after the intrusion, I witnessed my sister climaxing from the criminal's dick…
