I come into your room to tell you that while I was looking in your wallet to 'borrow' some money, I found your condoms! After teasing you and saying I'll tell on you, I convince you to show me how to use them. Well we don't have any bananas left in the house, so I guess you'll just have to use your cock as the demonstration. I've seen you walk out of the shower before so it's not weird! I realise it has to be hard for me to put them on, but that's no problem as I've seen you staring at me around the house and know that flashing my boobs and teasing your cock with my mouth will get you rock solid in no time ;) Once it's on I mention I'm curious about how they feel, and you should fuck me.. I know you want to. After fucking in various positions and making me cum, I rest for a second just stroking your cock. I start talking dirty about how you love fucking your step sis, and mid dirty talk you cum in the condom right in front of my eyes!! I manage to take it off and have a great idea. I've already made you cum, so you can just continue fucking me bareback and there's no risk of you cumming inside me... right?