I've Got It Bad For Step-Dad 4

Stepdaughters are so confused by their feelings for their stepdad. He's like a Dad...but he's sexy. Is that wrong? They can't help late at night but to think of him spanking them over his knee. Even though it's wrong, they can't help rubbing themselves while they fantasize. Little do they know just how much stepdaddy actually WANTS to help them out!