Step-Mommy has noticed your recent sexual urges. At first she didn't realise that it was over her, just hormones. After all it's pretty weird to keep getting boners over your Step-Mother. But at the Halloween get together at your house she notices you checking her out in her sexy Halloween costume. Low and behold you get another hard-on and it's pretty difficult to hide it this time in your tight costume. Embarrassed and ashamed of your erratic behaviour Step-Mom sends you upstairs to calm yourself down. She needs to talk to you about your forbidden thoughts, and wants to teach you a lesson that you will never forget. You want to fuck your Step-Mommy so bad - fine! Go ahead and explore her body in your tiny new form and get it out of your system. Now you're a shrunken, pathetic loser of a Step-Son - hopefully next time these disgusting thoughts contaminate your brain you will associate this scared/vulnerable feeling with her body. But perhaps not - being this close to her pussy and finally getting to lick it makes it impossible to get rid of your tiny lil boner. Maybe she's been too nice to you - in comes Step-Mommy's friend and guess what sweetie... he's got a massive cock and she's about to show him the time of his life while you watch like a pathetic little cuck.