She is cheating on you with your stepbrother and that is evident from this pov video you are watching from FantasyFams

This video is a sex scene of cheating stepsister and stepbrother. Obviously, as they indulge themselves in philosophies of forbidden passion, the POV cam.[Page 138] records every provocative movement and gesture of the pair. The vibes between them are intense and passion filled, not to mention how much the fighting never stops.