Fuck stepsis on her birthday

My stepsister just turned 18 and now she thinks she's a grown woman and she can do whatever she wants, even suck her stepbrother's cock. She tried to do it once, then again and finally I gave up and let her do it, but she wouldn't stop. Now she wants me to fuck her and hell with that bitch! I'm gonna show this little slut how a real man treats a tight young pussy and I'm gonna make her cum hard and eat my hot sperm like tasty dessert!