It's my 18th Birthday and my Dad has asked me to come and see him for a secret Birthday surprise. I'm so happy now that I've finally turned 18 and it must be something really special if Dad has asked me to come and see him in secret for my present!! I find him in my bedroom and ask him for my Birthday girl gift and to my shock, he pulls out his cock from his trousers! I ask him what I'm supposed to do with it and he tells me that he wants me to suck his cock now that I'm all grown up. At first I'm a little bit stumped for what to do, but Daddy helps to guide me and I take his cock in my mouth. I ask if I'm doing it properly and after a little while he tells me to get on my knees and he'll take over. He fucks my throat really rough and I'm drooling and covered in spit. I keep telling him that he's being too rough but he doesn't care and he carries on, fucking my throat harder and harder. Eventually he tells me that he's going to cum in my mouth and he expects me to swallow it all. I don't want to be ungrateful and so I do as I'm told