He calls here little sis in the video. The two masturbate on the couch under a blanket while an older man is sitting around in the background unaware.

Another video of this couple: http://www.incestflix.com/watch/love-hurts-96-brother-sister-strip-poker-9-ball

There’s actually a bunch of videos, some of them are titled as being with “daddy” which is suspect but, these appear that they might just be retroactive titles for the videos.