Their step-daughter had had suspitions that her step-mom and step-dad were having sex with her older step-brother after she went to bed. She would lay awake at night and would hear her step-mom moaning while her step-dad fucked her. On occassion, she thought she heard her brothers voice coming from their bedroom but she wasn't sure. Tonight, she heard them having sex and when she went down the hall and peeked in their door, her step-brother wasn't there at all! She watched her parents fuck for a few minutes but her step-dad saw her and invited her inside. She was hesitant at first, but after s... Show more