Your Big Stepsister

You barge into your big stepsister's room and I tell you to get out and stop annoying me like usual. This time though, you've got the upper hand. You're not leaving until you get what you want. I snuck a guy round last night and you caught it all on camera. Now you're demanding I give you a blowjob or you're going to tell our stepparents. I beg and plead, but I guess I've got no choice. Let's get this over with quick before our stepparents catch us...