You caught your step-Sister watching porn topless... She thought she was home alone. You also recorded her and you are blackmailing her to have sex with her. You'll only let her delete the video once the sex is over. She cringes having sex with you but also enjoys it a bit. When its over.....it's not really over. She finds out that deleting didn't solve the problem because you have a backup and blackmailing her forever. *pov sex without dildo and implied cumming