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 attempted 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 cock-squeezing young pussy and I`m gonna make her cum hard and slurp my hot sperm like tasty dessert!