I catch my sister jerking off

Well it turns out that i caught my sister's slut jerking off in our own house. that's right, just how it sounds: the girl sat on one of the sofa, turned on the camera and began to touch her pussy for her new friend to see. a boyfriend who has laid down and is more horny than me, who makes him record scenes of this type so that he can then jerk off. my sister is hot, i really can't blame him.