A knock on the door

You hear a knock on the door. You get up and after making sure your hard on went down you answered the door to see your sister, dressed like misty from pokemon.

"Jeez what took you so long, are you coming with me to comic con or what?" She says as she looks you up and down.

"Just a sec let me get around then we can go." You say as you close the door. As you are undressing you hear a creak from your door way.