maybe the sister knew the video is a sex video.
Its a fujoshi thing dude
She thought it was hentai furry video but the horse guy just untie the belt and tied it again without doing anything, so they just trolling
Ohhh!! Wait there is a subtitle in the bottom! My apologies! Now I wanna know if he untied it....
I'm sorry!! I'm a disgrace to the fujodanshi family!!
I don't get the belt thingy. Someone olease explain it to me