Wow, Cam Whore in My Home

Things have been tense around the house since your new stepmom and her daughter Madison moved in. Madison a spoiled brat who gets away with skipping college classes and spends all day locked in her room. One morning a friend sends you a link to a webcam model he thinks looks like your stepsister. Upon closer examination you realize that it is her. You decide to use the information to change things around the house. Seconds after you send her the pictures, Madison comes storming downstairs to deny it. How dare you accuse her of such a thing? She even threatens to tell her mom that you sent her naughty pictures. When you point out that she is wearing the exact same underwear as the girl in the pictures, Madison has to confess. She begs you not to tell your parents and even offers you money to keep her secret. Money isn't what you want however and you explain that you are happy to keep her secret if she gives you a private show. Seeing no other way out of trouble, sister sits on the table