Billy didn't even realize his stepsister Lily was home so when catches him sending some sext pics to his girl he freezes and she gets a really good eyeful. Instead of being embarrassed Lily hugs him and sits on the couch even though no one could miss his dick is raging through his pants. In fact as she looks at it her panties slowly get wet and soaks through. Billy always suspected that, One - Lily has had a thing for him for a while and Two - Despite how innocent she looks she is a hornier slut than any girl he knows