My step-sister eagerly takes my cum in her mouth

I've been trying to get my step-sister to give me some head for a while now, and finally, she's come around. I mean, I'm not her brother, right? So, it's not like I'm crossing any lines. But it's not just about the act itself. It's about the way she does it. The way she sucks, the way she swallows. It's like she's been waiting her whole life to do this. And let me tell you, it's worth the wait. She's not just any girl. She's a 19-year-old amateur with a body that screams "fuck me". Her tits are small but perfect, her ass is round and bouncy, and her pussy is tight and ready for anything. But it's not just about the sex. It's about the garage, it's about the college, it's about the fact that she's a student and I'm her professor. It's about the power dynamic, the taboo. It's about the fact that we're not supposed to be doing this. But we are. And we will.