Stepsister stretched by big birthday boy

Oh my goodness, I've forgotten your birthday!! I'm so sorry, what can I do to make it up to you? What does my stepbrother want most for his birthday? Okay, I'll bite. Do you want to show me something in your room? I wonder what it could be. Fine, fine, I'll close my eyes and hold out my hands... Oh! What you, your cock! Oh, you're huge! It's so big. I never knew... I never thought I would want my own stepbrother's big dick, but I can't resist! Please let me play with it. I've never seen anything like this and I forgot your birthday, after all. Let's see if it will fit in my small mouth. I want to try but there's only so much I can take... it's just HUGE! Maybe my pussy can fit more of you. You can stretch your stepsister out as much as you want.