After being raped by an intruder for five days, I got a full erection when I saw my sister easily fallen in her uterus on the third day.

On the first day of the long holiday, my mother went to see my father, who was on a business trip, and I was alone with my sister and I until five days after the holidays ended. A stranger broke into his house, aiming to see him! ! The culprit tied me up and raped my sister right in front of her! ! I want to help but I can't! But seeing her face being fucked, she got excited and got a scumbag. The third day after the break-in, I witnessed my sister cumming with the perpetrator's dick...