My stepsister Elaina is a cum-hungry slut

Your step sister Elaina is cute and blond and she wants to play a game with you today. Do you want to play doctor with her? She is finally 18, so there is no reason not to play with her. She promises to keep your time together a secret. You decide to play along and you take your dick out of your pants. Elaina is pleased with what you have to offer. Watching her suck on her candy stick intrigues and excites you. The way she is dressed makes her look like a big piece of candy and you would definitely like to see how she tastes. Very small titties are your thing and hers are just that. You nearly jizz on the spot when she calls you "big step-brother," but you maintain control for now. She tells you to hold your dick as tightly as her pussy would hold it. How does she know about this stuff?